The cringiest scenes/plots on the show?
Personally:
Gay Jesus - what was that. Like the whole thing... absolutely horrendous plot, and you could say Ian was doing it because he was mentally ill and it was his mental illness acting up but he had a WHOLE GROUP of people supporting that.
Kev and V's mom - ???? why would that ever happen. It was so weird, like insemination and IVF were completely off the table I guess.
Debbie and literally any of her love interests - the rape, the baby-trapping and fucking the DAUGHTER of your girlfriend is insane.
Frank and Karen sex scene - I wish I didn't have to see that.
Sammi and Frank sex scene - I wish I didn't have to see that even more