I don't think there's a problem that an antitrust intervention could help solve, rather a lumbering hierarchy where the people who make the decisions don't understand or care enough about the niche.
Microsoft wants to attract developers from other platforms: Windows native code supporting no package managers that are all of good, general and fast is just the kind of situation that will make developers who come from other platforms hate the time they spend with theirs.
Microsoft's real interests don't seem to be the problem here: Windows losing its best package manager only hurts what they want to achieve.
It's a small example and the annual market for Windows package managers could be less than a single team's budget, but the same holds for virtually every niche these days. Subsidized solutions offered by the pre-2008 companies with little chance for independent competition. We are not going to remain an innovative economy unless we find a way to crack down on this behavior.