I have Cptsd due to punishments before I could even speak and continuing for most of my 'growing up'. I rarely understood why I was being punished and became wary and hypervigilant. Fear has been my most common emotion since I was small.
See "reactions to trauma" Fight, flight, freeze, fawn repsonses. It explains a lot. I am always disproportionaltely afraid when anybody around me displays anger or aggression of any sort.
I fear trying anything new because I am so afraid I will fail, and consequently be punished, mocked, ridiculed, etc etc.
I am getting better but my first 30 years on earth were absolute hell due to expecting this rage and punishment no matter what.
I am conditioned from early on to this reaction.
Now I finally understand all that, it is getting better but I am 70 years old. Diagnosis at 68 helped me a lot.