"copes"
Please do not use incel terminology.
"I am unable to relate with anyone, as I view them as inherently self interested as they have reproduced (i.e. my parents) or will eventually reproduce and hence are acting in their reproductive interest."
https://trueleft.createaforum.com/human-evolution/misinformation-about-racial-origins/msg22150/#msg22150I personally give a bonus to women who reach menopause without reproducing, as I can henceforth look at them with certainty that they will never be reproducing.
Almost all Counterculture-era icons have reached this age by now, of whom many have never reproduced. In a few more years, even the youngest of the late 90s debut batch will be at this age also. Surely you can find their works relatable? (I can make specific recommendations if required.)
"Is this what "becoming an adult" feels like?"
For the majority, becoming an adult feels empowering. That you feel the opposite shows that you are still different from them. So if they are the typical adults, then logically you are not.