Didn't Microsoft lose a large anti trust court case about this shit for internet explorer?
Yes and no.
MS made Internet explorer uninstallable and made it even if you could install Netscape you couldn't set it as the default app. Forcing teams to open ~~internet explorer~~ edge is more in line with iPhones and Android. Both phone OSs will let you install different browsers, but opening links from most 1st party apps opens safari or chrome with no real way to change it. It's one of the worst things about phones and now MS is trying to move Windows that direction.
It's going to get worse. Once corporations start to adopt edge MS will move to make browser office the only office. Clicking a .doc in edge will redirect to browser word 365. Saving already defaults to the cloud, soon we'll have "virtual downloads" that save your download to your cloud and you can only meaningfully interact with it via edge.
We need more legislation and regulations allowing software choice for all platforms. We've never been allowed to own software, now we can't even buy a perpetual license. Soon we won't be allowed to have a copy of software saved on our devices, and files made by that software won't be allowed on our computers either.
If you think it's crazy your school uses three year old programs wait until you find out how many businesses are running XP!