MS was a bigger chunk of the market, and it was, well, a lot more _blatant_. And already had a history of dubious behaviour by the late 90s (eg see https://en.wikipedia.org/wiki/AARD_code). As someone else mentioned, MS in the 90s to early noughties was probably the most egregious case of tech misbehaviour ever (though some of Intel's stuff also wasn't great), so you're kind of grading on a curve here.