I 100% agree. zombie rounds are the worst. Playing as a zombie sucks, the initial infected isn't an interesting antagonist to play as, and being regular crew is awkward. Zombies themselves rarely pose a challenge for the crew unless there's a second threat to the station. The initial infected can't really do any interesting gimmicks due to the nature of the role, and the strategies rarely go beyond sabotage X or lock a bunch of people in a room.
Roleplay wise, the crew just kind of doesn't do anything interesting. Again, zombies rarely take over the station, so "last survivor" RP is not a common sight. In rounds where zombies are dealt with easily, the rest of the round becomes a greenshift with a few people getting round removed.