Now I'm 22. Decided to start one more time at the same Uni, same faculty, second semester ahead. I'm getting average (or little below avg) marks. I became more focused on non-IT-classes, because I managed to find ways how can those math/phys "things" can be used in practice.
Result:
+I became little more self-confident, headstrong, hard-working guy
+I developed ways to be more connected with people
+Forcing myself to study things I don't like (physics) somehow makes my brain smarter, nimble, flexible
+I don't struggle with procrastination
-Being older than the others in group is little bit uncomfortable
-Problem with employers asking questions about that pause/harddepression period
-Endless comparisons to younger friends in my mind