i think you may have answered your question and concern, I do believe if we draw for hours and everyday, we are probably gonna get hyper focused, frustrated, and burnt out. It happened to me two weeks ago. I was trying to create a character and it wasn’t coming out right. I felt overwhelmed because I needed to - create a figure - anatomy - clothing - original look, not looking at one reference - shadowing its a lot for me since I’m new to character design. I took a two day break and decided to go back to the basics. I went back to using gesture, cylinders and boxes. I just build the body and that’s it. No anatomy. Small goals and build up when I start to get better. i believe drawing is very hard and it’s a slow growth. But if you ever find yourself frustrated and going for hours…. bro trust me take a break. Your art is not a reflection of your self worth. take a break and come back after 2 days or more if you need more time. Sometimes doing the same thing every time might be boring. Maybe just focus on gestures then boxes, or portrait. hope it helps!