There are plenty of examples of "critical" utopias which do not try to be absolutely perfect, and acknowledge where they fall down. Anarres in the Dispossessed

There are plenty of examples of "critical" utopias which do not try to be absolutely perfect, and acknowledge where they fall down. Anarres in the Dispossessed by Le Guin, and the Culture novels by Iain M Banks might be two examples. They're still vastly preferable (imo) to current life on earth.