Jar-Jar can be every bit as annoying in this show as in EP I. However, season 1, episode 12 shows the character at his least annoying and most competent, so I’d say that one is probably worth watching.
I just looked through an episode guide. That’s the episode I was referencing. He was tolerable. I think the animation helps too. He doesn’t look so idiotic. Like you said, he’s also not shown as a complete idiot.