I did not contact that person anyways and I doubt there is a way. But at least knowing when I was blocked could help me deduce what might be the reason.
Honestly I do find this quite upsetting.
I believe the commonly accepted answer is "Yes, it's not my job to give you the necessary information to improve yourself". The same people who say that also often ask "Why aren't the people around me improving themselves?" :P
(Personally, I would prefer it if people pointed out my mistakes, and I do the same for others as a courtesy, not an obligation. I do understand if they don't have the energy to do that, but I think if they don't, then they forfeit the right to complain about a lack of improvement)
But that’s in no way comparable. When in the real world i screw up I can tell from people’s responses. Body language, their actions etc. In this case it’s just discovering at one point someone blocked one without any indication of when that happened and why without any indication.
//edit: also even weirder in an effort to see where our interactions might have been i found a tweet from 2014 by myself about the same topic: https://mobile.twitter.com/mitsuhiko/status/5264923088676700...