I've done a Fixby Gold and a Birkby Bitter, both I disliked right up to 5/6 weeks, after that they were cracking.
Not suggesting yours will improve (sorry) but you never know, I have never brewed a kit that I didn't like at first taste apart from these two.
My first brew (which is conditioning at the moment in bottles) was a Colne Valley, and I didn't notice any off smells from it. In fact I had a bottle or two after a week, and they tasted very drinkable (perhaps it's just my excitement over my first brew). I did leave it for 2 weeks before bottling though... dunno if that would make much difference.
but from what ive learned on this forum, if you have a sip and recoil in horror, then sling it.
if you have a sip and think`mmm not sure about this one` then give it time to condition and itll probably get much better.
fingers crossed