I wouldn't say I hate what I write, but do have quite a lot of difficulty looking at it objectively. Something I have been told quite often is that one should just go for it with no initial editing, then walk away for quite some time, certainly a week or two, and absolutely resist the temptation to start re-reading and fiddling.
This for me sounds as though it's the strategy I need to adhere to... I always quite like the style of my first attempts, but if I immediately get jammed in the read... fiddle.. read... fiddle rut, I begin to like what I'm reading less and less and it all simply becomes a mess of words in my mind. Possibly experienced writers here might be able to provide some tips.
Another suggestion I've been offered... if I'm starting to live a story in my mind 24/7 then it's crucial to get balance in my life. In other words I need to go out and have a round of golf and socialise with friends etc. This also helps restore objectivity. I can usually see my own work more clearly once that balance has been restored.
I'm a novice, so much of this is theory. But I do think it is relevant to the problems I always seem to encounter.