My main problem with the walking dead tv show is that there is only so many times they can talk about misery and kill zombies before it starts to get tedious. That particular character you mention was also pretty dumb imo because the acting wasn't great and he was too cartoony to really be hated. When you look at the fantastic portrayal of some of the bad guys on TV like John lithgow (full of nuance, interesting back story etc.) it makes it even worse. The dialogue is also maddeningly dumb and they always have to spell out everything and never trust the audience to figure it out for themselves.
So yeah the walking dead is a fun show but it could have been so much more and it never will be.