So your argument is "We should ban it because it is hard to counter for the new players" ? What kind of reasoning is that ?
The games you showed are at 1100, most of the players are completely inexperienced, have teams which are not well balanced (and I guess it is normal because you start playing). If I sweep a lot of beginners with Volcarona, Scolipede or Haxorus, we should ban them ? Also any specs mon will be very hard to counter for the new players. And I guess it is the same for balanced teams : if you are an experienced player and build a solid team, I don't think beginners can break it easily.
I have also seen calc saying that Magearna CM wins against Volcarona. I don't know how the calc were made but actually in game I never lose with Volcarona (the offensive and the bulky one) against CM Magearna. Well of course if you switch after 2 or 3 boosts, yeah you can lose against it but it is on you, don't blame the mon, blame you. People want to ban it so badly that they are talking nonsense.
Is Magearna strong ? Yes
Should Magearna be ban ? Maybe
But is Magearna unbeatable ? No he is not
I admit that the specs set can be annoying for balanced teams but isn't it the role of a breaker ? With a choice item (specs or band) you have so much raw power. Any mon with a base power of 130 with a choice item is deadly strong.
About trick, yeah it is strong againt defensive core but it has drawbacks. First of all, if you give your specs to something like Rotom H you can ben annoyed and secondly, most of you are talking about Chansey/Blissey who can be trick but if you predict wrong and don't get Chansey/Blissey ? Mag cannot beat them anymore. There is one try. And this is something I think people tend to forget : play a lock item, it also has risks.
Of course you can click volt switch on Hippowdown but if he EQ he can severly dent your Magearna. And if he is spe def, he holds a specs fleur cannon.
Again I don't say he is not strong, he is, really strong but I don't think he is the monster you are describing.
I believe you don’t fully understand what makes Mag broken.
“I have also seen calc saying that Magearna CM wins against Volcarona. I don't know how the calc were made but actually in game I never lose with Volcarona (the offensive and the bulky one) against CM Magearna. Well of course if you switch after 2 or 3 boosts, yeah you can lose against it but it is on you, don't blame the mon, blame you. People want to ban it so badly that they are talking nonsense.”
Okay picture this scenario, you swap into Volc on their Mag while it setups a Shift Gear, it Calm Minds the next turn, if you Flamethrower it, you activate Weakness Policy and it OHKOs you with Stored Power, if you setup QD, Msg continues to boost up with CM and SG til it can kill Volc with Stored Power. Setup variants of Mag aren’t one note either, if it set ups CM or SG and you swap to Pex to Haze Stored Power variants, you risk getting OHKOd by Electro Ball or dented badly by Tbolt, enough to where it can beat Pex 1v1. This set doesn’t break Mag, but it can destroy balance teams expecting Specs and that brings up one of the main problems with Mag, its versatility.
“Is Magearna strong ? Yes
Should Magearna be ban ? Maybe
But is Magearna unbeatable ? No he is not”
Nothing has to be Mega-Rayquazza levels of broken in order to be too much for the metagame. Vish was far from unbeatable due to the existence of Toad, Gastro, and Bunker Pex, but it was banned due to centralizing the meta into just Clef/Corv/Toad teams. It forced you to run Toad or Bunker Pex in order to not get 6-0d by it. Mag fits this criteria as it forces players to run multiple Msg answers in order to not fall flat against it, which restricts team building.
“I admit that the specs set can be annoying for balanced teams but isn't it the role of a breaker ? With a choice item (specs or band) you have so much raw power. Any mon with a base power of 130 with a choice item is deadly strong.“
Specs Mag isn’t broken cause of its high SpA stat, its broken due to that and a combination of other traits like one of the best defensive typings, resistance to rocks, and good bulk giving it much more opportunities in switching in and breaking than other breakers. Rilla has a handful of good switch ins while Urshifu needs to land an Iron Head/Poison Jab in order to not to get walled by Clef. Mag can just launch a Fleur Cannon or Flash Cannon and OHKO/2HKO almost the entire metagame even to resists like Drill, Heattom, and Ace. It’s Volt Switches hit like a truck and it not only gives Mag momentum but it also lets it chip mons like Blissey, Heattom and heavily chips Pex and Corv. Flash Cannon lets it 2HKO Amoonguss and OHKO Clef while still being a nuke. Trick is what I believe broke the gear’s back, it lets it cripple Chansey/Blissey, Pex, Drill, Corv, Ferro, etc, and it’s not like it can‘t run anything else, Aura/Focus Blast lets it OHKO Drill, 2HKO SpD Heattom, and even 2HKO Blissey after one or two Volt Switches.
“About trick, yeah it is strong againt defensive core but it has drawbacks. First of all, if you give your specs to something like Rotom H you can ben annoyed and secondly, most of you are talking about Chansey/Blissey who can be trick but if you predict wrong and don't get Chansey/Blissey ? Mag cannot beat them anymore. There is one try. And this is something I think people tend to forget : play a lock item, it also has risks.”
Heattom is risking giving Mag momentum or getting 2HKOd by Fleur Cannon, your forgetting that Mag has other ways of beating Blissey/Chansey and its other “counters”. For example Blissey/Chansey are two to three Volt Switches away from being 2HKOd by Fleur Cannon or Focus Blast. “play a lock item” is much easier said than done when it comes to Mag also good luck if it turns out to be CM SG. Also even if Mag doesn’t break something the first time it can always come in again due to its typing + bulk. Its a very low risk high reward mon.
“Of course you can click volt switch on Hippowdown but if he EQ he can severly dent your Magearna. And if he is spe def, he holds a specs fleur cannon.”
No decent or experienced player is gonna leave their Mag in on a Hippo and click Volt Switch. SpD Hippo is an unset, like congratulations now Ace can break past you. All of our viable Volt Switch immunities are 2HKOd or OHKOd by Mag.