I am sick and tired of seeing all circumcision lumped together as mutilation

it's the definition of the word. sure, it carries a lot of negative connotations that may not have affected you the same way, and you may have, personally, appreciated your circumcision, but that doesn't invalidate the feelings of others. this isn't some zero-sum situation where other people being upset about it somehow invalidated your experience.

Many people can feel different ways about things. That's called society. A key part of civilization is our ability to all live together with many different people feeling different ways about things. In fact, a huge advance in civilization - no shit - is that, several thousand years ago, we stop killing each other over this very issue. REALLY.

In a much more contemporary context, it's just not necessary. Most recently, as recently as the late 1970s and early 1980s, a now-debunked study pushed the idea that it was, at least "more hygienic" to circumcise males, but that was based on shaky and now-debunked studies. In modern medicine, circumcision is no longer recommended at birth except in rare cases of medical necessity of urinary or other birth defects. Exceptions also exist in some religions, Judaism most prominently, not for medical necessity, but as an alignment with a belief based on ancient mythology, not unlike the genital mutilations some women undergo in Islam — also widely/globally denounced.