I think you will find that social anxiety is just one of many anxiety related forms you probably go through...
Low self esteem, feeling inferior, pretending to be someone your not, fear of the future etc etc etc....The list of anxiety forms is quite long...
Overcoming self loathing is the starting point....I believe when we accept who we truly are for who we are and not what we are we start to heal...It begins by lowering the expectation bars we all either placed on ourselves or others placed on us....We are humans not machines or robots...We will make mistakes and do f**k things up at times...Its how we learn...Its how science and technology and all those other forms of the human existance progress...
Its when we have our motives in the wrong place and that causes us to f**k up that we truly suffer...The result is a guilty conscience which is like gourmet food to anxiety and DP...
All we really gotta do as humans is behave ourselves as best we can, love ourselves as best we can (for who we are) and be useful to others when its required..
There is a balance in life to be found between being totally self absorbed and a total doormat...One is just as bad as the other and is at the source of our resentments, anxiety and stress and hence our DP...
Life should be 50 % oursleves and 50 % others....Its a nice common ground when you constantly feel guilty for being self centered or resentful for being taken adavantage of.......