I got more invested in Season 1 as it went along, and I can sincerely say I liked the pacing of it and most of the characters, and though it had some cringe and frustrating moments, I liked it more than a lot of superhero TV I've watched.
But then, they decided to make a "cliffhanger" by delaying the Season 1 finale to be the first episode of S2. So you start a new season after waiting like a year, and it's awkwardly picking up at the climax of the last season, you're just not even invested anymore.
The show's writing quickly spirals out of control from there, as they try to recreate certain DC storylines again, rather than tell more of a unique (albeit slower) story like S1.
I honestly can't believe they're even making an S3, but god help this train wreck of a show.