In trying to avoid a nervous breakdown trying to solve the pinching problem, would you please tell me which video I have to watch so that it helps me with coming up with a solution?
Dude, modeling with all quads and getting perfect topology with no pinching is not an easy task. The modeling pros have a hard time with that. Most of the time what you do is just give up and say meh, no one is going to notice that little pinching there. So don't be too harsh on yourself with that.
That said we all always try to strife for our models being perfect. The Mesh Modeling Bootcamp course is also filled with great topology and modeling tips. If you haven't seen it, here's the link
https://cgcookie.mavenseed.com/courses/blender-mesh-modeling-bootcamp
