The outcome wasn't very good. First off be happy that your are not going back. I don't see this working in your favor. The pool guys will be looking for any reason to hurt you. They could sabotage your work, or just make sure that you look bad. If you have worked on a project were the contractor's doing the work don't get along you should know how hard it is to come out with your hide in the end. In this case no option but to walk away even if the owner wanted you to do the work, the pool work and the pool is reason you had the job in the first place not the other way around. When you first start out you have to take on what ever work comes your way to pay the bills. After some hard lessons, and paying your dues you will get to the place were you are picky about what jobs you do and who you work for. You have to be paranoid about every project you do, think about all the bad that can happen and CYA. This will come with time and experience, ( money lost). If it was easy everyone would do it.