Is being pessimistic and easily offended a relationship red flag?

I am self aware that I am too passamistic, ego driven and have a low tolerance for some practical insults, specifically teasing.
I also tend to keep people who are too positive at a distance because mostly they are rich enough to sustain some damage, so they don't see the issues which me and friends go through.
On top of that I belong to a minority group to begin with in my own country, and coming to a different country made me a minority of a minority, so I don't mix with a lot of my own country people as I have PTSD flashbacks how they treated me and my equals and things are getting worse in my own country.
And I lose confidence as soon as some questions are along those lines. It's just my weakness
Is being pessimistic and easily offended a relationship red flag?
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