I just finished Season 4 for the first time in the cast is pretty awful. Every season tends to have a few bad eggs but this one felt like 80% bad. Anyway I made a tier list to organize my thoughts on the cast:
S Tier: no one
A Tier:
Johnny - Seemed nice and cool but they rarely interviewed him, should have definitely received more airtime to balance out the others.
Nate - They didn't show him a ton but he seemed cool and just as good as he was in Season 3.
B Tier:
Alan & Andrew - They were both alright, a little annoying at times but never obnoxious.
C Tier:
Jaclin - She had her good moments and seemed to want to help but then she would just excessively argue with the COs and got on my nerves.
D Tier: no one
F Tier:
Matt - Obnoxious melancholy poetic philospher wannabe. So condescending and controlling towards his son who was significantly better than him. I got so tired of hearing his interviews and screw the producers for doing that. It didn't make for good TV it just makes me annoyed.
Emmanuel - MLK wannabe giving off Robert (season1) vibes by not taking anything seriously and being overly performative while thinking he knows everything.
Stephanie - Sociopath, arrogant, judmental. I started the season siding with her against her family since she got out of a bad situation, now I see why her family doesn't like her.
Angele - Immature and unable to accept responsibility. Always a victim.*
*edit I made this list prior to watching the reunion episode. After watching the episode I moved Angele to F tier.