the worst part about bellamy's storyline is, in my opinion, it was out of character for him to betray his friends. Yes, the religion thing turned out to be right, but he was not the same Bellamy thay we got to know in the past 6.5 seasons
Clarke is one of the bad guys for sure, she destroyed the lives of hundreads of people, and you cant justify some of her actions because they happened due to Clarke's selfish reasons. Also imo Cadogan (was it the name?) or Bellamy aren't any better than her. Cadogan manipulated almost an entire human race into worshipping him, Bellamy also did fucked up things on the earth, so there was really no good guys in the show. Well, Monty was a good guy but he died too soon. Other than him, almost everyone had blood in their hands for whatever reasons.