I thought STVI treated the characters horribly. Kirk's a racist, Spock's a rapist*, McCoy and Uhura are incompetent, the entire plotline directly contradicts "Yesterday's Enterprise" etc. etc.
*and yes I'm aware Spock mind melds all the time, sometimes against people's will. But in VI the violation aspect was deliberatey played up. Add to that, the bridge crew just sit around and watch Valaris screaming in agony.