I think that the whole situation is a bit more complicated than that:

Sure, Hatton should follow Mayweather's advices a bit better, but I think we really can't blame everything on that: There is also the part where the trainer is able to motivate a fighter and his ability to make him swallow the wizardry of boxing, perhaps Mayweather hasn't been able to adjust to Ricky about it, which is a part of his job indeed.
Also, Mayweather has a lot to be blamed for: not supporting Ricky out of the Ring, not being the first one over him when he got knocked down, never admitting any part of blame in the defeat and finally being overpaid (how much do we talk here, 300-400-500 000$?) and not being able to wake up on time more than once. It is unacceptable. If I was a pro fighter, the guy I would hire would be the best available to my situation and you can be certain I'll expect a lot from him, the first thing is being on time. We do not talk one or two time lates here, we talk a lot. To me, it shows selfishness, especially when the guy answers simply: "Ricky should retire if he can't beat Pacman or My son". After only 2 defeats how can you say such thing? you're supposed to be supportive of your fighter, at worst, say something more elusive like: "we'll have to see things together and discuss about what's next", not simply elude he should retire and that is it.