I seen people suggesting comments like “fuck you” over and over again, but I would actually reply with an actual lecture on how it’s immoral to install a secondary software with a primary software install. Be very explicit.
They’ll probably not care about your comments, but at least they’ll know why you uninstalled, and have it as a data point. And if enough of their customers do the same thing, then they may change policy about it.
About forcing the need to leave a comment when you’re trying to uninstall that secondary software, I think that’s happening just because you selected the ‘other’ option, and unfortunately that’s something of a standard with these kind of question dialogs.