There was no alternative but to slow down ourselves for reasons I will explain.
Maybe if you had advised no longer able to comply with the aforementioned speed restrictions (which, I assume, you had read back and thus accepted), there would have been no excuse for any "sarcastic remark" and the whole situation would have been avoided! Then again, I guess it doesn't bother you that the following traffic has to go around due to your non-compliance with an atc clearance.
At the same time, I do concede that putting you a bare 3 miles behind the preceding traffic AFTER having gone around was probably not the best way of handling things!