You and my ex are kindred spirits. I’ve heard him say the same things many times. Warms my heart to hear them again.
Going from memory, I think one of the things he hated most was the inefficiency and inelegance of Microsoft. It was a piecemeal product that required constant add-ons, fixes, modules, more modules, and other unwieldy coding. I know there was a lot more to his complaint than that, but it may give you an idea. For some reason he bore a special animous toward IE. Microsoft overall he merely despised, but their browser he outright hated.