when i was severely depressed during art school, what helped me was realizing i could achieve what i wanted through immense odds, not being beaten down, but replacing bad thought patterns with growth logic.
never really did anything when someone told me i should stop trying, i will say one teacher told me i should just leave if i'm not going to try, which, i was trying, and it was basically a "fuck you" grind through the last project and i accomplished a lot (still looked like garbage tho lmao), but it became a major source of anxiety everytime i did fail again.
i mean, luckily i still push past it even though i've died quite a bit inside, but that kind of thing doesn't work for me anymore, i just ignore them and keep going, not faster or harder, or if it recurs often enough, break down and waste hours with self-doubt when i could have been just drawing.
those guys just need to understand that there's literally nothing stopping them but themselves, and they're their biggest obstacle. they can absolutely come to drawing with an attitude of positivity and even joy, and achieve what they set out to in the first place.