Indifference and neglect often do much more damage than outright dislike.
J. K. Rowling
I know Rowling was likely referring to intolerance in a social capacity, but this could also apply to your writing. If you continue those negative thoughts previously mentioned, and as a result avoid writing altogether, then what is likely to follow is a loss of drive, of purpose, or even desire to write. You neglect something continuously, even your writing, and you may find that one day you are incapable of doing it any longer. Use it or lose it, folks.