Two possibilities that I can think of...
1) If you're not a fan of climbing, and you are using a smart trainer at home, maybe you don't appreciate the trainer's gradient emulation and the need to push against stronger resistance when climbing. In that case, perhaps lower the trainer difficulty in Zwift's setting menu and see if you like that better.
2) Or perhaps the part you find unfun, especially if you are using a not-smart trainer or Zwift with lower trainer difficulty, is the apparent feeling of "not getting anywhere" as you slow down significantly on climbs without little to no physical feedback. If you're on a smart trainer you could try increasing trainer difficulty so that you feel more resistance as you do these climbs, for closer-to-realistic feeling. Also maybe put a riser block (well, more specifically a taller one) under your front wheel to get a closer feeling of actually climbing (and engaging the right muscle groups at the same time).