Actually, the animation was the only thing good about it. And by which, it's good for Flash. Pretty smooth, but not quite Foster's Home.
But for an actual review, you took the words right right out of my keyboard. The characters are flat. Really, really flat. And when the heck did Robin become so... completely out of character? Like, he was not Robin like at all. Even during the quiet moments when they aren't fighting anyone or dealing with issues of grave importance, Robin wasn't so... well... egotistical and jerky. And somehow, they completely forgot Beast Boy was a Vegan. Which is pretty much like forgetting Fozzie Bear tells jokes, since he brought it up quite often in the series. The whole sandwich guardian thing seemed like something out of something like Mucha Lucha or Viva Pinata. Some show that revels in it's stupidity. It couldn't even have fun with that.
I would have liked the Character voiced by Tara Strong being a closet fan of a show Tara Strong does a voice in if Tara Strong bothered to mention said show is not like that. They even blew an opportunity for a biting parody of that series by turning it into a generic Care Bearsy gag. Only thing I even thought remotely funny was the end of the pie episode, which had the potential to end with a creepy Ren and Stimpy-esque dark note, but they panicked and pulled back on it. Not even bothering with Negative continuity. Though the fridge horror of Cyborg and Beast Boy's pie fight was kinda fun. Essentially throwing around dead people.
To me, the real problem is this. It's quite obvious they wanted to make a Tiny Titans cartoon, not a Teen Titans series. it even looks a little like Tiny Titans. If they wanted a comedy superhero series, the show they should have tried doing was a Teen Titans version of Marvel Super Hero Squad. Don't make jokes about pies and sandwiches and foods with funny names. Make fun of your own continuity, and be very sharp about it. MSHS got away with turning Professor Xavier's School for Gifted Children into a stereotypical high school where they fought a villain dressed as a lunch lady. That's wacky and a fan bonus. Hopefully the tone will change to comedy with some action in it, but so far, it's just a series of flat jokes and flat characters.
They really should have been exactly like those shorts. Animation and continuity referencing. Seriously, this show is worse than Krypto the Superdog. At least it was fun some of the time.