Learn to embrace the bumps in the road... they lead to the ever expansion of your boundaries... in mutually fun and enlightening ways.

As asked, I'll add...

Next time, try. The various blocks you mentioned were magnified by the 30 minutes... and perhaps 5 minutes, or even 1 minute would have sufficed as an initial attempt... especially if you had begged a boon to not have to finish or to submit yourself for chastisment or punishment because you couldn't continue.

You might have learned that he was satisfied with the attempt. You might have learned that he expected you to fall short and had evil and wicked "next steps" in mind. How can your master train you if you don't try and fail.

And that doesn't mean of course, to fail on purpose. That provides us no pleasure and we usually can tell. No... part of our motivation for asking the difficult is indeed to see you try for us.

And clearly, trying, even failing, and begging to be forgiven for failing, in no way constitutes topping.

PS. I'm not suggesting this for hard limits... However don't suggest an alternative in-scene. Save that conversation for later. Just safeword out of it and move on.