Sony entered the market earlier against weaker competition. Sony worked with nintendo on an add on to the super nes that became the playstation. When sony entered the market they also paid for exclusives and at the time on consoles japanese developers were still the big hitters for consoles.
MS entered the market almost a decade after Sony mid way through a generation where Sony already had the lion share of the market.
So now MS is trying to make more inroads and they are simply doing what sony has been doing since the onset which is buying up developers. If the regulators cared about making sure the market stays open and competitive they would never have allowed sony to buy an outside studio and surely wouldn't have allowed it after the dominance sony displayed during the ps2 era. But they have what purchased a dozen studios or so since then ?
The only way to create content is to purchase someone who is already making content or start from the ground up. Even sony has shown that purchasing those already making it is the preferred way but now they don't want other companies to do so.
If the regulators cared about the market they would be encouraging stronger competition. I could easily understand UK stepping in if MS had purchased a dozen studios and in a generation went from last to overwhelming first and then they wanted to buy activision. But considering that MS is in last and has been in last every console generation they have been part of it seems silly to think that just buying activision will change it
I question you. If Microsoft used half of the 70 billion on content creation and studios creation, on a not crippled console, would Sony still be here?
But no... While Sony grew it´s studios, Microsoft closed them: BigPark, Good Science Studio, Leap Experience Pioneers, Team Dakota, Function Studios and SOTA were disbanded, Lionhead and Press Play were closed. Just here we have 8 studios!
So, the way to create content... Is to create content... Buy talent, grow studios, and create great games. That's how all companies grow... Microsoft did not do that... It went the other way around. And now it tries to recover by buying others.
Take a look at the studios Sony aqquired recently,
Insomniac - Not a multiplatform company. For more than a decade it worked mainly producing exclusives, one for Microsoft, all others for Sony.
Housemarque - Not producing a multi game since 2012. Working since then on PS Exclusives.
Nixxes - Mostly working as a colaborator, it specialized on converting games between platforms. Not a multiplatform creator.
Firesprite - Created in 2012, it produced only 4 small games, one multi platform and 3 PS exclusives.
Bluepoint Games - Lots of games and a huge history on PS exclusives, mostly remakes, remasters or convertions.
Haven Studios - Never produced a game.
Bungie - Multiplatform producer since it separated from Microsoft. It was bought and remained multiplatform.
And now Microsoft:
Zenimax Media - Announced Starfield and Elder Scrolls VI as multiplatform. Now, CMA is saying they are exclusives.
Obsidian - A multi platform producer, taht was producing Outer Worlds 2 and Avowed before aquisition. CMA claims both are now exclusives.
inXile . Multi platform team. CMA claims it´s now producing an Exclusive.
Ninja Theory - multi platform team. Since aquired produced Bleeding Edge and Hellblade 2. Two Xbox exclusives.
Compulsion Games - CMA claims it was developing Midnight. Now an Xbox exclusive.
A Double Fine - Launched Psychonauts 2 on Playstation, but no PS5 native version.
These are all companies listed buy CMA as multi platform that Microsoft aquired for total or pacial exclusivity.
According to them, showing a pattern that can be also used on Activision.
I do not want to take sides on this (specially because this has to do with market rules and regulations, and not console preferences, and I do not consider my self an expert on market rules), but the reality is that you cannot compare Sony aquisitions with Microsoft aquisitions, since no Sony recently bought team ever took anything away from Microsoft.
And regulators care about the market, just not the market as you see it. Competition is fine as long as others can still compete in equal terms, and according to CMA, that may not be the case.
I know football has in every fan a potential team manager. But now we are also seeing every console fan as a potential regulator...