Well of course it's not true when you re-frame the argument into a strawman like that. A large percentage of proprietary programs are also blatant copies or rip

Well of course it's not true when you re-frame the argument into a strawman like that. A large percentage of proprietary programs are also blatant copies or ripoffs of something else. The issue that we're trying to get to is that free/open source software is principally better, not that all open source software is always less buggy or more featureful than the proprietary software it's intended to replace. Obviously that would be a ridiculous assumption, anyone who's seen all the crap throwaway projects on github can attest to it.