Them not bother with Linux says all there is to say about their anti trust cases. Only thing that bothers them about monopolies is that they arent one, and even when there is an opportunity to enter into a market where there is no competitors they don’t want to bother investing in it. They don’t care about open platforms or investing in it first.
It’s why they were late to getting a hold of PC distribution. And in the unlikely event Linux OS takes off be complaining about Steam’s presence there.