What do you find difficult to tolerate?

Willful and stubborn ignorance and deliberate cruelty

Antagonising people then claim they're the victim.

People who hurt others because they enjoy it, and
animal cruelty

rude people.
people who say something trying to be funny but it's not

Mental and physical abuse.

Bad manners.
Lack of fairness.

Narcissism

Bad manners

That list is quite long and therefore I conclude that it is my ability not to handle it the way that is fittest for my benefit is what I cannot tolerate the most.

Hypochondriacs, whiners, (which includes people who are always making veiled threats to kill themselves or imply they wish to be dead), control freaks, abusive a-holes who feel it's perfectly all right to bully, name call, or even attack other people physically, and most of all people who think it's all right to hurt children or animals.

People who assume rather than ask questions or seek the correct answer.

Dumbness, Irresponsibility, miunderstanding and laziness

People who don’t respect my boundaries and get into my business.

Intolerance

Bad referees!

Rejection

Dishonesty, making fool of others

Unfair criticism and situations.

Myself.

Slobs

Tolerance -_-

Gypos

No comment.

People.

Lies

Bullies.