The problem has nothing at all to do with 5e, though. It's a mismatch between player expectations of what play will be, which just happens to occur, in your example, in a game of 5e. If you have players that disagree about what play should be while doing Monopoly, you have have a similar argument -- "Every time I play Monopoly with my friends, they keep making silly trades of properties to try and get one of every color, and it's very frustrating to me!" It's not a 5e specific problem, it's a problem of players not having their play goals aligned.