No, I won't, because it isn't. Unaware < Flash Fire on defensive sets, and generally less than magic bounce / intimidate as well even if those ones are a bit more arguable.Yes, Landorus is one of the exceptions that is noteworthy that Skarmory can check that Buzzwole cannot, as is Stakataka. However, Buzzwole is bulkier than Skarmory, and thus can handle many of the same threats, barring those that take advantage of the typing difference between Zygarde and Skarmory (ie, Lando and Stakataka). However, anyone who knows Pokemon would know that that is to be expected when comparing pokemon of similar roles of different types. As for your comment about Unaware, that is still Buzzwole's strongest ability, and you will see that when the new VR comes out here soon.
As for Zygarde, I have already discussed the faults of Buzzwole in that Matchup as a reason to ban Zygarde. Though Buzzwole can be Toxic'd (though not all that common on Zygarde), Skarmory fares worse vs Zygarde due to Thousand Arrows (252+ Atk Choice Band Adaptability Zygarde Thousand Arrows vs. 252 HP / 252+ Def Skarmory: 154-182 (46.1 - 54.4%) -- 56.3% chance to 2HKO). The move that is on 100% (barring bad sets) of Zygarde's can nearly 2hko Skarmory in the air. Outrage and Toxic are not nearly as common (being seen on about 50% of Zygarde's at higher tiers) meaning that there is no guarantee that your calc would even be relevant. As for Bulkier sets of Zygarde, Buzzwole can handle those too (0 Atk Buzzwole Ice Punch vs. 188 HP / 68 Def Zygarde: 232-276 (57.4 - 68.3%) -- guaranteed 2HKO). So yes, Zygarde can toxic, but Buzzwole has a guarenteed 2hko on the most physically defensive variant seen of Zygarde at higher tiers, seen about 10% of the time according to statistics. Not to mention the fact that Buzzwole does get Taunt, so it can block Toxics from slower threats.
And no, my last paragraph is not misinformed on the playstyles and goals of AAA. If Skarmory and Hippowdon are facing threats carrying magic bounce, the only thing that they themselves can do to stop that set up mon is to attack them with their stab move of choice. They can't whirlwind or they will be phazed out instead, Hippo can't toxic or it will just be poisoned itself. All they can do is use their primary stab and heal. Now, that can be enough if the set up mon doesn't do enough damage, but it simply makes the walls sitting ducks if they cannot.
Also, if you must comment on my experience in order to try and prove your point, then maybe that's evidence you need more proof to support your claim instead. Someone as well versed as you in other metagames should be able to keep the argument objective, rather than personal.
Toxic is not uncommon on zygarde in the slightest, and neither is subtect or cb adapt; altogether, these comprise a majority of all zygarde sets, and none of these lose to Buzzwole unless the Buzzwole predicts really well against the subtect set since ice punch has a limited pp. Meanwhile, Skarmory takes 0 Atk Zygarde Thousand Arrows vs. 248 HP / 252+ Def Grounded Skarmory: 110-132 (33 - 39.6%) -- 99.8% chance to 3HKO very well, meaning it counters defensive zygarde and can soft check every set bar magic bounce. It takes on defensive sets due to Thousand Arrows having the same pp as roost and roost recovering significantly more hp after smack down, and while offensive sets do better against skarmory then defensive ones skarmory can still phase them out or even pp stall them in a pinch.
The only Magic Bounce Setup Sweepers we have are Gyarados, Necrozma, latias and Zygarde; Of these, Necrozma sets up on both skarmory and Buzzwole, Latias sets up on both Skarmory and Buzzwole, and Gyarados sets up on both Skarmory and Buzzwole. This leaves only zygarde as mentioned above, which makes the point essentially irrelevant.
My comment on your experience is not to prove a point; I had already proven all your points wrong. Instead, it's a suggestion that rather than continuing to make uninformed comments, you get yourself informed. That way, instead of this entire conversation being me correcting misconceptions, we can have a valuable dialogue.