Was it??? People have always complained about Valiant being too strong, too quick and too versatile. Coming up against a Valiant has always had a "let's spin the wheel and guess what one of 50 different sets it can run": is it Specs, Booster CM, Booster SD, Scarf Trick, Mixed Life Orb and this is before it Teras which it doesn't really need to anyway.
Well, Tera suspect happened and it was No Action, so until another Tera suspect happens, it will always be test the Pokémon.
Okay this has been disproved so many times but fuck it, let's count it - 14 Ubers mons right now,
- Annihilape
- Baxcalibur
- Chi-Yu
- Chien-Pao
- Espathra
- Flutter Mane
- Iron Bundle
- Magearna
- Ogerpon-H
- Palafin
- Regieleki
- Sneasler
- Terapagos
- Ursaluna-B
18 (I believe) including ones that went up and have come back down
- Cyclizar
- Gliscor
- Houndstone
- Volcarona
Now out of these mons, how many are actually broken because of Tera? Annihilape Tera Water, Espathra Tera Fairy/Fighting, Regieleki Tera Ice, Volcarona Tera Anything and Terapagos Tera Stellar. Out of all those bans only a handful were actually because of Tera, maybe the problems were exacerbated with Tera but at its core the mon was still problematic.
I also don't vibe with this point because yes, Dynamax was clearly broken and yes people like Tera more because it is nowhere near as broken and has more uniqueness to it - it's not just because "it's fun" it also is competitive to a lot of people otherwise we wouldn't even be having this discussion.