Not saying you ARE definitely neurodivergent, but difficulty with jokes and sarcasm to the extent you’re describing is not neurotypical behavior. Basically, no, the behavior is not normal, it’s atypical.

Regarding your longer comment, having rigid, unconventional, self-made rules is another behavior I see in a lot of the neurodivergent individuals I work with. Again, not saying you definitely are neurodivergent, but these are not neurotypical behaviors