At the risk of falling into a trivialization trap, a lot of things you may not perceive as traumatic actually are. I was embarrassed for a long time in both group and individual therapy to say anything in my childhood was traumatic, because I was sitting with people who had suffered horrible physical or sexual abuse. But here are some things that are, in fact, traumatic and - when they occur over a long period - can set you on a course of maladaptive coping for decades if not addressed:
Being told or shown that your emotions are not valid, that you have no safe place to express them
Parents or caregivers oversharing graphic trauma from their past with you
Threats of physical violence, even if not carried out
Being told or shown that affection or approval is contingent on competency or academic success
Prejudice from inside OR outside the family (homophobia, racism, body shame)
Mocking or dismissal of things that are meaningful to you
If you constantly feel unworthy, afraid, ashamed, or even flat and emotionless, it's worth exploring why. And, because you've been so consistently undermined and minimized, you may feel like a fraud for being upset or functioning poorly. You're not a fraud; it's years of conditioning telling you "I should be able to handle this" or "lots of people are worse off than I am so I shouldn't complain." Your conditioned brain is lying to you; you won't be able to open yourself to the joy of trusting relationships with others OR do meaningful things to help those who are worse off until you do the work to melt the block of ice surrounding you. All my love to you, friends.