I remember this from when I was a kid. It was that you only watched while you waited for the next show to come on. Even as an 11 year old, I felt like the characters were really dumb and the jokes weren't funny.
As an adult, looking back to it, the characters are just poorly written cliches. Alley is the smart girl, Trish is suppose to be the mean girl, Dez is the dumb guy who is suppose to be likeable (Which he isn't) and idk what they were going with with Austin, because he has no personality at all.
They went hella wrong with the cast, as none of them are likeable at all. Alley seems like she's trying to hard to be relatable. Trish didn't get the memo that her character was suppose to be mean and confident. Dez is trying to be cute but he's just so punchable it hurts. And, I'm pretty sure they didn't even explain Austins character to him because he's not interesting at all.
Instead of trying to make funny jokes, they dial up the 'dumbness' of the characters for a giggle, which ruins their cliches, and also makes Dez more annoying than cute, because at this point we've had too much dumbness to handle.
If you want a better musical show, just watch Victorious.