Shampoo won't lather

It could be you water source. Either excessive chlorine or hard water. A shower filter really helps, as well as an electronic water conditioner. I installed one in our house and the filter in our master bathroom. They made a big difference. Laying off the ammonia based coloring will also help end your problem.  You hair person won't be happy though, they make their money on repeated haircuts (especially with razors), perms and colors. The more they damage it, the more you will pay $$$ to fix the damage. 

have you tried a multivitamin supplement. maybe the color product you are using is not that good.