Do not say that your art is terrible.
Do not ask how bad it is.
When you do, you are already forming opinions in others that are not to your best interests, they will then confirm what you told them.
When you remain neutral, asking for constructive critique, you may be surprised at what people do enjoy and appreciate in your art, such a morale boost will keep you motivated to get even better, and as you improve you will get even more praise, from just a little switch in attitude.
You will still struggle with artist blocks and feelings of incompetence, but such is the nature of any creative pursuit.