The topic is super interesting but sadly I do not speak spanish (or not enough, at least) to watch your videos.
Do consider however that the dislikes you have could not be so much about the content and its validity but about pretty much anything else: the pacing, the presentation, whatever. It's really hard to tell from just a simple dislike...
The only advice I really have to give you is: do it for yourself, not for others, and don't bother yourself with those dislikes all that much. As a musician, growing a spine is going to be invaluable to you. I mean, I'm a music major myself, and scenes like this happened from time to time: the conductor stops the music and points at someone, highlighting why the bit they just played is wrong, and has them rehearse a few times in front of everybody, sometimes to the point of saying something along the lines of "You're making everyone lose their time, just go rehearse and be ready for next week". Life as an artist can be brutal and you have to be able to stomach and sort criticism, constructive or not, warranted or not. So, you know, do this for yourself, strive to find your flaws and iron them out, and don't mind those dislikes so much.
Also I'm sure you are super solid about your theory, music history and everything but if you ever want to discuss something, my door's open
