Unless I misunderstand you, that is not the point of regulation.
Er...be more specific and accurate because I feel you your statement is missing a lot there about what regulators actually do.
It’s up to interpretation, I mean I'm quoting Star Trek here lol it's not meant to be too serious. Though I align with what MrMagoo wrote.
Regulation is there to ultimately help promote what’s best for consumers in terms of offering more value or making things more affordable etc.
I think it's predominantly clear that MS is trying whatever it can to compete, and other new entrants are currently dying off.
If regulation does not want the merger to proceed, they should be involved in regulating other parts of the industry in particular around content control to ensure that other competitors and new entrants have a chance that they can actually win if no mistakes are made.
Contrast this with Steam and Epic store. Steam is the main incumbent, and Epic is doing everything they can to gain marketshare. Steam has done absolutely nothing to block Epic in it's goal to gain more market share, and this would align with your original statement here
The point of regulation is to ensure companies with market influence don't abuse that power, it is not about trying to compensate or correcting the buying behaviour of the public.
And Steam haven't, so your statement holds true.
Whereas Sony clearly _is_ through it's content control practices, not to mention being the most vocal and active participant in the proceedings here - whereas I'm pretty sure Steam doesn't give any shits what Epic does.
If regulation can see the downfall of a merger, and they want better fair competition at the market level such that these mergers don't have to occur, then they should be regulating how content control is currently happening. Because as it stands what we are witnessing today with this merger, is the cost that regulators believe will be the amount to actually upheave Sony's dominant position at 70B, that should provide a price point for any new entrants or cloud entrants to break into market as long timed exclusivity, degraded content, and locked exclusivity continue to be a thing. Because if there was a cheaper and faster way to do this, MS should have accomplished it first before going this route.
MS has had it's hands slapped a great deal of many times for doing what Sony is engaging in, essentially skewing things in favour of the dominant platform to maintain dominance. MS became the dominant OS platform, but they stopped those types of moves a long time ago. They haven't been in regulatory scrutiny for some time.
TLDR; whenever I see the comment that 'MS Mistakes' are the reason it's number 3. What I'm reading between the lines is that their first party is the reason for their failure. But it fails to neglect the impact of exclusivity and content control places in the market. If you want it to actually be about the 'mistakes' of a platform, only by removing all content control practices, can platforms only compete on their services, their own first party IPs, and their hardware and pricing.
And that would be fair. And regulators should go this route, effectively only now being required to look at acquisitions which they can freely block going forward, knowing that platforms are required to do their own heavy lifting without having any influence over the 3rd party segment.