Hello, this sounds like an impact of bullying, I went through a similar childhood and I'm therapy with complex trauma (please note there's a difference between PTSD and complex trauma. Try to find a therapist who understands this). My trauma was too "weak" to cause typical ptsd symptoms however it ruined my life.
Here's a good book Bullying Scars: The Impact on Adult Life and Relationships
You can also read a book by Pete Walker on CPTSD
You could read that in the meantime while you're looking for a complex trauma therapist so you can explain what's bothering you and have the "vocabulary" to explain your problems in a way that would make the therapist understand you.