Why don't people like Heathers the Musical?

I'm genuinely curious because I've loved it for years but I keep seeing people saying stuff like "the songs are good but the show itself isn't" and I'm just wondering why people don't like it because I haven't heard negative opinions of it up until recently.

I'm genuinely curious because I've loved it for years but I keep seeing people saying stuff like "the songs are good but the show itself isn't" and I'm just wondering why people don't like it because I haven't heard negative opinions of it up until recently.