You may be irritated and disappointed because you have just initiated to study how to draw and you are finding it more difficult than you thought it was.
Or you may be attempting a new theme or a new procedure or a new drawing medium and your labour are not meeting your hopes. You might also sense that your drawing is out of date and you are not making much progress.
The first piece of advice I would give is to not be so rigid on your own self! Even specialists get depressed occasionally! Each skill you learn, like drawing or knitting or riding a bicycle, utilizes movements of a number of muscles and thought processes. It needs time and preparation for your brain and your muscles to become familiar with you!
If you are in this situation it may be helpful to look back at drawings, or sections of drawings, that you think were successful and put these pictures in a place where you can see them. Do not attempt to draw something too hard right away; aim to find something somewhat simple and attractive and draw that.
In addition, use a drawing medium that you are familiar with and as you get comfortable with the objects you are drawing and the medium you are using you can start to give yourself, more difficult things to draw. You can also desire to ask a pal whom you know will give you constructive advice,to go through your drawings and give you some thoughts on how to do better.
Handling bad feedback on your drawings
First thing, try not to take it in person. Although the person giving you opinion says something for example, "You are horrible at drawing," you should interpret for yourself as, "Your drawing expertise require more sharpness." In a nutshell, any unconstructive feedback is not targeted to you, it is about a proficiency that you are learning and getting mastered. To learn, it takes time and hard work and sometimes a bit of unconstructive criticism is part of the learning process.
It is not easy to be objective about your own drawings and it is even more complex to see the defects in a drawing that you have been gazing at for hours. In these circumstances it is very useful to get some 'pessimistic' feedback. You can select to apply it as a learning event.
While someone speaks pessimistically about your drawing expertise ask them (as courteously as you can) to specifically point out areas of features of the drawing they are unhappy with and what their suggestions are for you to progress. You should also remember to ask them what they feel is the plus points about the drawing. Any good feedback should be taken personally!
Follow this advice while you study how to draw and you will never be trapped for a longer period of time.
Soon you will see this will make the difference for your drawing success! Always keep this advice in mind and you'll never again stop on the road to success!