Goldman, many of us get mocked, it is the way of life. You should have learned in art school to have some plasticity. The rest of the world isn't filled with replicas of you, and you will grow if you can learn to understand others' points of view, work with point-counterpoint. Ignoring everyone is futile. Being a defensive wall is a lonely pursuit.
I've taken dozens of art studio courses and years of design school. Standing up and absorbing criticism is part of getting a design backbone, one made from listening and tweaking and changing and keying in re focus that adjustment benefits.
I have heretofore stopped myself from telling you that the cartoons I like are from the New Yorker, as that is a playground I am guessing you are not exposed to and probably wouldn't enjoy.
Robert Mankoff, the New Yorker cartoon editor, has a very good blog on cartooning and what makes something funny.
You can look that up on google.
I suppose that there are many online blogs on making comics. Check them out.
Learn to use google.