Covid to Long Covid have been shown to make changes in the brain's neurological symptoms.

Since I got Covid in September 2023, over 1 year now for me, I have experienced brain changes. The close people around me tell me so, as well.
I am now a full blown introvert. I still go out and try to live my life but I hate going out and I hate a lot of people-how they act, if they get to close to me, what they say to me, etc. I perceive people to be nastier than before-meaning, I dont trust their hygiene.
I have had major depressive symptoms since getting the Covid.
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Check out this article on the neurological aspects of it:
https://www.neurology.org/doi/10.1212/WNL.0000000000206148
Conclusions:
Neurological symptoms are common and persist in COVID-19 survivors, suggesting a substantial burden of these issues. This highlights the need for multidisciplinary services and resource allocation in the post-COVID era.

If you feel like you are a "different person" it is because, basically, you are.