I don't get this season 1 -> season 2 point that's been bandied around a lot lately
Like sure season 2 definitely is better. But it's also very indicative of the tone and melodrama of the first season. So if you didn't like that in leftovers don't bother with the rest
I enjoyed the show overall for sure though. Even made a thread about it (and this was just after the first season haha). But I gotta say I was not happy about the series finale. It propped up a relationship that held no weight to me whatsoever so it just ended up feeling so inert
I think the tone and melodrama are way more over the top in the first season than the second or third, and it drives many of the characters to the point of just being flat out unlikable. But also just in terms of plotting, Lindelof reorients the show away from aggravating wastes of screen time like the Guilty Remnant or Holy Wayne in S1 into stuff that's actually more interesting to watch.
I mean, I didn't like S1 because of the aggressive melodrama but ended up liking the second and third seasons. It's still melodramatic but Lindelof and co. have a stronger handle on that tone in S2 and 3.