I wouldn’t say Microsoft is comparable to the others, although there is a lot to evaluate too.
But they don’t run closed app stores and have much more serious competitors on everything they do.
As cmaier pointed out Microsoft absolutely runs a closed App Store and has for ages on the Xbox.
Meanwhile, in what Arena does Apple not have serious competition?
PCs? Dell, Lenovo, Asus, etc
Smartphones? Google, Samsung, Huwaei
Smart speakers and set top boxes? Amazon, Google, Roku
Digital music? Amazon, Spotify, Google, Microsoft, Sony
Movie/TV streaming? Netflix, HBO, Amazon, Hulu
There is not one major category where Apple doesn’t have significant competition and in most of them they aren’t even the majority holder
The same cannot be said for Google (search/ads), Facebook (social networks), or Amazon (Ecommerce)
That’s the big 3, that’s where the FTC/DOJ focus should be, that’s where the market abuse and/or spread of disinformation is primarily occurring. Apple may not be perfect, but nothing it’s doing approaches the abuse of power of those 3.