Severe TBI from car crash, now severe social indifference

Hi everyone!
I hope all is doing well. I had a severe TBI a year ago after a major car crash. I am physically doing ok, however mentally I have a severe indifference towards society. I get very angry and do not like people very much. This is not how I was before the accident. I always tried my utmost best to be as kind as possible to everyone I encountered. Now it is only a select few that I show this kindness towards. I get so angry at unfairities, people who do not care for the environment, nature, animals and people in need, when people are self centred and narsassistic. This has made me turn in to a rather bitter person which I hated, and it is obviously not helping my recovery. I was at a psychiatrist in December last year and he advised I have PTSD. I have quit my job and have become a bit of a hermit and extremely introverted.
Ignorance is bliss ,but its almost like I can't be ignorant. A large percentage of humanity seems ugly to me. Leading to occasional and irrational suicidal thoughts.
Is this normal and part of the recovery process? Will these feelings go away?

I cannot afford a phsycologist as I am unemployed and am scared to work with people again.