I am biased as Community (not 'the' community) is my favorite show ever, but still...
Community is a show that rewards you for investing in it. It's definitely more of a niche show, not for everyone, but if you stick with it, get to know the characters and what it's trying to do, it's definitely worth it. It's not a show that necessarily wants to make you laugh out loud all the time, although it has a lot of hilarious episodes, but the study group, their friendships, relationships, trials and adventures are what form the core of the show.
Season 1 is when the show was figuring out what it wanted to be, some things were pushed by the studio (Britta / Jeff being the focus for example), I'd say Season 2 and 3 is where the show was at its very best and had the biggest budget. (Remedial Chaos Theory, Advances Dungeons And Dragons and the paint ball episodes are really amazing)
Season 4 was made without the original creator, and has some flaws (and Chevy Chase left), but some great episodes in there too (the Jim Rash directed puppet episode).
Season 5 brought the creator back and is really solid, and emotional with Donald Glover leaving. Episodes like the Ass Crack Bandit are some of the best in the series.
Season 6 was when the show moved to Yahoo, and although it was a bit different, it was still hilarious and experimental. Keith David and Paget Brewster were really solid additions to the cast and the last episode, if you watched the whole thing, will make you cry.
So yeah, I'd say stick with it, but only if by the end of Season 1 you somewhat care about the characters and are invested in them as a group. If not, the show is not for you.