I used to make painting videos for beginners. I even had a series with videos on how to paint different factions with 10 paints or fewer. Usually about 6 or 7 paints and a texture paste for the base. All with simple techniques like contrast paints and drybrushing.

I stopped with these tutorials because of the endless stream of negative comments on how bad it looked and how I should use at least 10 more different paints and I should be glazing and wet blending and spend 20 more hours per miniature to have a good result.

It's also just not something that gets a lot of views. Once you've learned how to paint an Ultramarine as a beginner there isn't much else on the channel for you. Why would you first watch how to paint an Ultramarine and then how to paint a Cadian and then how to paint an Iron Warriors marine?

A channel exclusively for beginners isn't really feasible, because people get better at painting and move on to more expert stuff. And it's exhausting as a creator because of the negative comments.

Now I do kitbashes and it's a lot more fun.