Considering how dominant Sony is, and how the sales in Europe move around the big multiplats, taking one of them and making it exclusive is definitively going to push the XBox way more that it has ever been done before. Will Sony keep their big advantage over there? Will they still lead, but only slightly?

what does activision have that is even any good? cant think of the last time i played a good quality activision game

Depends on what games the European market likes. If the European market likes Call of Duty and other activision games mainly, then it might affect them hugely once MS makes those games exclusive to Xbox. If the European market doesn't care much about call of duty and such, then it's not a big deal.

So only diablo? I guess theres not much loss then. 

Guitar hero, Tony hawk, crash, and spyro are irrelevant in 2022. Call of duty can still bring in money, but not like it used to. I don't think candy crush has much more life in it. Not sure on the status on wow. So I think your post proves my point. They definitely sold high. 

He recited this list as if this stuff has the same weight as Mario, zelda, smash bros, Mario kart, animal crossing, and pokemon lol

Call of Duty is huge in Europe and Game Pass is becoming more popular so of course it'll help to push Xbox consoles here.

He merely responded to a users question about what the relevant games are in this purchase. Not sure how you construe that with him trying to equate them to having the same weight as Mario, Zelda, Smash, Mario Kart, Animal Crossing, and Pokemon. It sounds like you're just a bit angry right now, take a minute to chill.

Playstation will still have a big advantage this gen there but this will shorten the gap and could bring the PS5 under 40m and the Xbox Series over 20m for a gap similar in size to gen 7. Long term it will make things more competitive in Europe for sure.

CoD is not nearly as popular in Europe as it is in the US. I don't know about Diablo etc. The impact of this aquisition won't be that big.