I'm usually pretty lenient towards the songs, but there are some that rub me the wrong way. Some of the songs I don’t like are:
You’re One of Us Now – Given the way Cera and the others proceed to act towards Chomper after one “oops-eeps”, it just makes them kinda look like jerks

Grandma’s Lullaby – Sorry y'all

Yeah I know this is a well-liked one, but honestly it just sounds pretty rough. R E P E A T I N G
The original version of Friends for Dinner - Just felt really unpleasant and mean-spirited towards Chomper on the gang's behalf. The TV series one is more fun and generally pleasant since by now they've embraced Chomper completely.
On Your Own – Littlefoot, for as much as he likes spending time with his friends, shouldn’t turn into a blubbering wreck just because he’s alone. Everyone needs their alone time after all. Plus it just bored me

Imaginary Friends – It’s an okay song, but I have to agree it doesn’t show much point with the rest of the movie. Not to mention those turtles take WAY too much offense to what Cera says about a concept they only just heard of

How Do You Know? – So boring it put the yellowbellies to sleep. You have to be a special kind of boring to bore THEM

Today’s the Day – Even LITTLEFOOT forgot this song the moment he stopped singing it!

Hot and Stinky - *gross joke goes here*
Better Off Alone –
Alice Deejay you are not.