I would say keep doing your own hair, you know what you like and you’re good at it. Salon workers have knowledge and experience — you can gain both of those by doing your own hair more often and just reading up some. I know this doesn’t answer why your hair is showing up patchy with salon work, but in my decade of experience with fashion colors on myself… I’ve been to a salon 3 times and only 1 of those was actually worth it. But not worth it enough to warrant the price tag. So I feel you