Is part of the idea that we're not supposed to like anyone?
I think the only likeable or nice character on this show is the disabled kid who has only had about 5 lines, and seems to have disappeared entirely since series 2, probably because he was too nice.
There is practically nobody to root for on this show, they all come across as rude, potty-mouthed, easily corruptible a-holes, and if they aren't already then they soon will.
Don't get me wrong, I've found the show entertaining and enjoyable (only started watching for the first time since lockdown) but I suppose my one issue would be the lack of likeable characters.
I guess if I can compare to a show which touches on many of the same themes and what may well have inspired this one, Breaking Bad, characters like Walt and Jesse are at least characters you root for even with the bad (sometimes despicable) things they do. They are written with more humour and personality, and don't eff and blind all the time, like pretty much every character on this show does, including the kids. This is where the writing could be a bit improved upon.