Me struggling with anatomy for art.

After learning the basics of drawing, i found myself been able to only draw artworks created by others. If i tried drawing from imagination, my art will be so bad that I'll tear the sheet out of my sketchbook angrily.

It got to a point i drew several severally and it wasn't still coming out nice that threw my sketchbook away saying "art isn't for me". Thats when i moved into 3d modeling when i heard that animating in 3d is far easier than that of traditional art, and its also a plus for non artist. I got to use blender at first which really didn't have a good interface but provided the shortcuts did the job okay, i didn't have a problem with it.

When i tried learning to model a human figure, i still had to get human profile view sketch and side view as a blueprint from my model.
I found out i couldn't run away from drawing because if i want to model my own character, I'll still have to draw it. I searched on the right way to learn to draw from imagination, i saw most results where alined to getting to know the anatomy.
I believe once i know how the muscles raps around the bones , and the motion of the bones when a figure is in motion or posing like the scapula or the clavicle, i know I'll be better in my art -figure drawing.