Note on (a): some will argue a difference between Google advertising Chrome on Google’s property (something they could do when bootstrapping Chrome) and advertising Chrome on other people’s property (something they could not do). But here, Windows and Edge are Microsoft’s property, like it or not.
Side A is fighting side B, and therefore has to take these measures that harm bystander C. Nope, their fight, their problem, don't mess with my computer. I can happily say MS is wrong and Google is wrong