[quote=@CajunRobinHood]
I am quite curious why there’s so much aversion to the updated rules. Nothing drastic changed, it’s mainly making definitions and descriptions more clear. Not trying to change y’all’s mind about playing, just trying to understand a mindset I keep coming across online but not with in-person players. 
[/quote]

I'm certain there are plenty of players who have moral or otherwise personal objections to the system. I would be lying if I said I didn't have a few of those, myself.

That said, even if those issues did not exist, the issues I have with the mechanics alone would be sufficient to convince me not to change to 5.5 D&D.

For me, the changes they made for 2025 fall into two camps; The changes I don't like, and the few changes that could have easily been an errata.
For example; I was never a big fan of the inspiration mechanic. It felt too arbitrary. In 5.0 D&D, you could basically ignore it, because it was barely mentioned. 5.5e makes it basically a mandatory part of the game, with feats and racial abilities that reference it. They also did not make it less arbitrary.
I do not like the addition of the special abilities for weapons; They generally don't seem to add enough to justify making combat go even slower.
I'm not against the idea of players getting a free feat at first level, but instead of just making that an optional rule - maybe including a list of suggested feats to choose from - they chose to tie them to the character's backstory. Instead of just fixing the background features mechanic, they tossed it out the window and made character backgrounds even less unique.

Be sure, this list in not exhaustive. 

If these were just individual mechanics I didn't care for in an otherwise good, but unique, edition of Dungeons and Dragons I would consider trying it out. However, they're not; They're changes I don't care for to a version of the game I already liked. There's no incentive for me to invest time and money into learning 5.5e, because it's not different enough to justify making the change, with the little that is different being almost exclusively things I don't like.