I'm not sure I understand the premise of the question, tbh. I don't think there's anything wrong with being a dom top per se, as long as everything is done consensually. I am clear in my profile that I am top only, and I often get messages asking if I am a dom. I tend to be more of a gentle top, but in those cases I clarify that I can be dom, as long as there is no expectation of me being aggressive because those two things are often conflated. One thing is taking charge, telling the other person what to do and even hard fucking, another very different thing is humiliation, name-calling and physical aggression (like spitting on their face, slaps, spanking, etc.). Maybe that's what the guy who blocked thought the other guy meant by 'dom'?
On the flip side, whenever I get messages from bottoms who essentially want to be 'used,' often referring to themselves with very derogatory terms, that is a huge turn off for me. I'm talking stuff like "make me your bitch," "destroy me like a worthless slut," "I'm yours, and you can do whatever you want with me." As I like to put it, submissiveness is hot, lack of dignity isn't. Still, I acknowledge some people find that hot and do get off on that power-dynamic fantasy, so, good for them, just not for me.
On the tops-to-bottoms ratio, I think that's an entirely separate issue and it is true that in many cities there are more bottoms than tops. I've often heard bottoms complaining about it and also of tops 'flipping.' In group meets, many bottoms get greedy and they want to be the only bottom in the room. I have also heard complaints that there are very few vers guys and that we should get rid of the top/bottom dichotomy, which I honestly don't share because that's a very personal choice. So yes, there are often more bottoms than tops, but I don't think that has anything to do with the dom/sub issue, as sub tops and dom bottoms also exist.