Jak 2 is an overrated game. Its open world is barren, basically a glorified hub world. Difficulty is unforgiving. Guns lack weight to them, especially compared to Ratchet and Clank.
I'll one-up you: the entire Jak trilogy is the most overrated series of PS2 games that exists. It's, as far as I know, once of the first series of truly awful games that nobody at the time noticed was bad due to the graphics.
Jak 1 is the best game in the series, but it's a glorified Banjo-Kazooie clone, and when the best game is a brainless collect-a-thon, you know we're in for a treat.
Jak 2 takes the ending of Jak 1 and just kind of ignores it, pivots to a new story on a non sequitur, and gives you an okay platformer broken up with bad shooting and even worse driving.
Jak 3 decides that apparently Jak 2 didn't do enough to ruin the coherence of the story and setting, throws the whole thing into the garbage
again, launches off in a new direction that requires you basically to forget the first two games, and once again has bad shooting, mediocre platforming...and surprisingly decent driving. Really, the driving is pretty fun. The trilogy then ends with cheap sight gag instead of any kind of satisfying payoff.
Also, Daxter isn't funny.