If you are reading this and happen to fall within the category of people
People who create melodies with clashing tones, don't know they do it, because if they knew it, they wouldn't do it.

It sounds good to them.
So your appeal to these people is useless because nobody thinks about themselves they belong to this category. I never met anyone who says 'Hey, I write clashing melodies'. They just are unaware.
It's like doing an appeal to all 'dumb' people. Nobody thinks about him/herself as being stupid. So nobody thinks the appeal is addressed to them.
Music is at a sad state these days.
I disagree. In the 80's and 90's, costs of making music where very high and only pro musicians dived into a studio to create music.
Nowadays, every kid with a laptop or tablet can create music with some cracked software. So yeah, there's lots more bad music around than 20 or 30 years ago.
I'm sure there is some great music available that you like, if you dig deep enough. People who say music isn't what it used to be, just don't take enough time to find the music they like. Or maybe they don't know where to search.
I do understand your rant, I encounter lots of bad music myself. But no rant in the world will change a thing about this. If you think you can change the world into a place without bad music, well, you simply can't.
What we can do, is change our own behaviour. When I encounter bad music, I can do 2 things, complain about it, waste my energy on complaining or I can move on and use the same energy to find the music I like and put my time in enjoying that music.
I'm an old skool guy, I even still buy cd's. I grew up in the 80's and 90's. But I don't want to return to the pre bandcamp/facebook groups times. I now have access to artists I wouldn't have had heard about in the old days. The fact I can discover so much more artists nowadays is a joy to me and it doesn't give me the feeling that music is in a sad state. Music business is in a bad state, yes. People can't earn their money like they did 20 years ago. But that's another discussion.
More access is more crap, I agree, but we have to live with that. Time to move on.
And we shouldn't forget that lots of people who create this bad music, have fun doing it and music should be about fun, right? Good for them!! And if I don't enjoy their music, I just move on.
Peace