Boring?

My boyfriend told me tonight that our sex is "boring" now bc he does the work... but yet when I do some of the work we always switch it up right after... I don't think he likes me doing the work not bc I'm not good but bc he likes to go really fast (in certain positions it's not easy to go as fast as he likes) I'm not sure what to do? But it bothers me hearing that kind of stuff no girl wants to hear that from her bf...