Should I be upset that I was circumcised?

I've recently learnt that the foreskin has more than 20000 nerve endings, and even though we don't know exactly what types of nerves are present in the foreskin, but most studies show that uncircumcised men report more pleasure and less pain than circumcised men. I already have a strong immune system, and besides, contrary to popular belief, I heard that circumcision does not DRAMATICALLY reduce the risk of HIV and other STIs (the 60% reduced rate being a myth, apparently), although it does keep the penis cleaner than an uncircumcised one. Should I regret being circumcised at a childbirth?

I really don’t think you should regret it. I personally disagree with circumcision at birth because I believe it should be your choice. But it doesn’t make a huge difference to sexual function or health from the stuff I have seen. I am uncircumcised, and I often wished I had been as a child because I had a tight foreskin and got infections down there, and you have avoided foreskin problems which is good.
As for the nerve endings, its true, but if you can reach orgasm then you are perfectly fine, because that is all they are for.
Hope this helped :))

my 2 cents
Im mid 20s guy and im cut. im happy with it for these reasons:
cleaner
aesthetically more pleasing and most partners prefer it vs uncut.
now am i missing greater orgasm since there are less nerve endings? its possible but let me say my orgasms are pretty intense. my uncut friends say i also lost length but thats not true. i lost skin not length. in fact i am above average but not pornstar status.
i wouldnt sweat it that you are cut

Curious to what you are referring to for “most studies show that uncircumcised men report … less pain than circumcised men”. What pain are we talking about here?