The fact that an inexperienced child who draws mediocre pictures for the internet has to come out and say this is just shocking.
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You are allowed to have/share an opinion.
Don't be a jerk about it.
It's okay to disagree with something.
Don't be a jerk about it.
Respect people's boundaries and beliefs.
If they are being a jerk about it, respectfully ask them to stop. If they don't, end the conversation.
If you go around looking for people and things to get mad about, you need to reevaluate what you're doing with your time.
Accept Constructive criticism. Use it to improve.
Ignore people who try to ruin your day with harsh words.
Don't be that person who tries to do that.
Don't use the internet as a way to be a jerk.
Don't steal people's work.
People spend their time making free content for you, appreciate that without stealing it.
If you are part of a minority that faces hatred from some people, don't assume the entire non-minority population is awful and out to get you or others.
You have no right to hate people just because they have an opinion that isn't yours. That's petty and will get you nowhere.
Give people a chance.
Give yourself a chance.
Anyone can be a good person if they try.

TL;DR:
Don't be a jerk.