in what context would you find it applicable to call something "overrated" if you don't believe that word is applicable when you're saying that you think a thing that is broadly considered to be good is actually bad? because I genuinely cannot conceive of another context in which the word "overrated' could be accurately used. from my perspective you sound like you've invented a completely incomprehensible topic to argue about because you think the word "overrated" sucks and it makes you feel superior to people who use it. it would be like if i suddenly decided that your use of the word "negative" is invalid, actually the only valid use of the word "negative" is the photography related noun, the word you mean to use is "bad"