I’m not sure what kinds of issues you had, but I used GoDaddy and was pleased with their support and ease of set up (this was my first website and I’m not great with technical things). I know there are other website builders more geared toward personal trainers, I just used GoDaddy because I had bought my domain through them and it was easy. I had a few bumps in the road but they got worked out.
I’m sure others can give you more ideas. Hope you find better luck elsewhere!