I'm assuming you don't know anything about Blizzard or anything about Microsoft games at the moment?

1. Blizzard is absolutely awful. World of Warcraft was a massive game driven into the dump. Heroes of the Storm was a great game that simply didn't bring in the mega bucks so they killed it. Diablo is in shambles and the company seems to want to persue mobile games. This is not good for consumers.

2. Microsoft games have been absolutely killing it. Their Xbox Game pass is extremely good value and features a wide array of games. They've been investing in bringing back great titles such as recently Age of Empires 4, which they did a fantastic job with reaching out to Relic studios for help with, and Fable 4 which is on the radar.

Ultimately. Microsoft might not be very good. But it's less about how good Microsoft is and more about how bad Blizzard is. Microsoft studios might be able to actually do something with the IP that is better for consumers as opposed to the really overly exploitative practices Activision Blizzard have been doing.

Then warn Sony and Nintendo as well since they are literally blaming Microsoft for exactly what they themselves are doing now.

Either allow Microsoft to buy Blizzard (which would be a good thing for consumers) and currently follows the general status quo. Or you stop the deal and tell Sony and Nintendo that they can't keep making exclusives at the level they are doing now.