Oh, so I'm an idiot for not liking something that everyone else likes.
Yes. Yes, if everybody else likes it and you don't, then you're the idiot. Also, calling it garbage when it objectively isn't also makes you an idiot.
it probably is garbage though
but no, calling someone an idiot for not liking something makes you just as much of an idiot as you claim he is.
It's more that he said that it was garbage. Calling a masterpiece garbage is objectively and empirically false. "Goodfellas" might not be his cup of tea either, but if he called it garbage, that would also be false. He's an idiot. And you're also an idiot for presuming that SMRPG is garbage, especially since you apparently haven't even played it.
calling anything a masterpiece is an opinion.
opinions are not wrong nor are they right, you need to learn this.