I also don't just mean outages like this... it's clear that Microsoft GitHub has been cramming a bunch of new stuff into the UI and not really treating it with care. I notice very amateur UI bugs, misalignment, bad spacing, overlapping elements, etc. all the time now. It was clear that old GitHub passed through a professional designer's eye quite carefully (or maybe just a developer with extreme attention to detail).
That's kind of how Microsoft works in general. Their products expand to have as many features as they can cram in. Word and Excel are probably the quintessential examples, where only a tiny fraction of users care about a feature, but they are passionate about it.