My tuppence

In my humble opinion it doesn't matter whether your partnership is a D/s arrangement; or vanilla; or anything else - if one partner has a genuine complaint to make it and the other ignores it that is potentially harmful to any relationship. In consentual D/s situations it's a no-brainer that the Dom[me] is responsible for ensuring that the sub's health isn't jeopardised by his/her actions, and it appears that may be potentially happening here. I don't that that you are topping from the bottom at all (even though I think that subs have every right to do so).

And if resentment is building on both side please persuade your Master to negotiate - even if you have to beat him into it! Otherwise the alternative is that he risks losing you (and vice-versa).

Hoping this helps a bit.

VV