People saying this is bad are likely not the right age group for it. The show is well-animated and has a very fun creative concept. The voice acting of some characters is great, and it's passable on the main three characters. The humour is more casual, there's not many laugh-out-loud moments, but it's not awful, it's just not supposed to be a full-on comedy for older kids or young adults. This however also brings a problem as the episodes are quite slow and not really very interesting.
Some of the plot ideas for episodes are really good, the synopsis's got me excited to watch them. But the episodes themselves feel like a bit of a let down. James gets turned into a phone - hilarious. But the episode isn't very interesting or funny and it pretty predictable. (Mom tells him not to get damaged for 24 hours, anddd you've figured out the rest). There's not many twists or good jokes to make up for that.
If you're an adult who likes cartoons like Adventure Time, Owl House, or even Looney Tunes, you probably won't like this, it's clearly aimed at a younger audience. The crocodile is cute and kids will like his mascot-like personality and energy. James is kind of a rude brat but has some good animations, Echo is... well she's kinda dull but she's not really the focus.
Overall, it's not for us, it's for kids, and for kids it's.... Okay. And it looks nice.