I'm sorry you're not having an enjoyable experience. I used to hate it, then I learnt to love the gym, and I've never been fat.  I used positive reinforcement on myself to achieve this. I take a caffeine pill every time I go to the gym (it makes me feel energetic). I write it down on my task list every morning, so I feel rewarded when the time comes for me to cross it. And I use this app to remind me that building a habit requires time and hard work, but pays off nicely.