i can't believe the OP mentioned problematic actor and you think about dating scandal lmao, i'm pretty sure thats not what she/he meant from problematic actor, dating isn't even problematic, drugs, bullying etc. (especially since this were the latest korean scandals).
As for OP depends on what the actor had done, i watched Seo yeji's latest movie, she's a shit and a bit crazy person but her acting is on point, her real life personality doesn't stop me from watching her movies/dramas, now if we speak about rapists, murderers etc (which i wouldn't call problematic, they are simply criminals), definitely not.
You literally said the exact same thing I did.... lol.