Frankly, I did not like most of your fan cels.  I 
think they were lacking in a lot of areas.  
However, if you really want to do them well, why 
not pursue training in art?  Most colleges don't 
require you to draw or paint well in order to 
take art classes, unless you are trying to get 
into a very high level place like the Art 
Institute.  I love to draw and paint.  Some of my 
fanart is good, in my opinion, some is not.  None 
of it is professional quality.  But I love it, so 
I do it, and I work to improve, and some day soon 
I think I will get that art degree. The point is, 
instead of getting discouraged, get motivated.  
If you don't care, fine, let it go, and don't 
waste time.  But there are lots of people who 
start out as terrible artists but with time, 
training, and practice, become very good. You 
must not be so sensitive though, if people 
criticize you- because then you will not improve- 
you have to realize that some criticism really is 
constructive, and everyone learns from mistakes 
(though not all mistakes, and not all the time).  
^_^