The 67-year-old has faced protests from sections of the club’s support against an extension to his expiring contract, with the Gunners enduring a worst-ever league finish of fifth under their manager to miss out on Champions League football next season.
“I don’t mind criticism because we are in a public job,” he told BBC Sport’s Football Focus.
“I believe there’s a difference between being criticised and being treated in a way that human beings don’t deserve.”
He added: “The lack of respect from some has been a disgrace and I will never accept that. I will never forget it.
“The behaviour of some people during the season, that is what hurts me most. It’s not my person that is hurt but the impeccable image of the club around the world. That kind of behaviour does not reflect what Arsenal is.
“A strong club is a club that makes a decision. It is wrong that in modern society it is not a question of whether a decision is right but whether it is popular. That has nothing to do with competence.
“People with responsibility have to make the right decision.”