Being a good submissive is like being good in bed. To someone you might be the best lover ever, to someone else not so much. I find that when I part ways with a Dom, they usually (not always) have that same comment. . .You're not subbie enough or good enough. When submissives and Doms are human too. Putting all the blame on you isn't fair to you.

I would suggest not worrying about what someone considers good, work on what you consider good. Once you know what you enjoy and what you don't enjoy that goes a long way in helping you find a person who will enjoy you for you. You'll be the best lover in the world to them, or best submissive ever.

I hope you take His opinion with a grain of salt.

~RK~