I agree, but this is a hot take among a lot of free software purists.
Maybe Github Actions has brought in a lot more revenue, too. They get a "discount" on Azure hosting, I'm sure.
However, all jests aside, being a relatively open source person, I haven't seen much in the git product of Github getting any worse after Microsoft acquired them. The social aspect, well, it is what it is, and I don't care for it, but I don't necessarily think my preferences translate well to a quarterly earnings call.
I do personally perceive the downtime to be more frequent now, but maybe only because it's more publicized, I do not have any data to substantiate that personal observation.