Lani please don't go!
I guess it is part of life when there are people who do not want to be part of something or when people disagrees with you.
Don't only think of the people who disagrees, but of the people who actually admire and really like your work. That's why people are joining your RPs. A lot of people like your works. I'm part of the people who really likes it. You are very creative and your stories and characters are really cool.
Not a lot of people minds the fact that if a character is too OP. We do whatever we can to make each character equal.
To the people who disagrees and if you saved a spot for them, they should be grateful for you because you actually thought of them and thought of them first.
I hope this helps in changing your mind