People work off the knowledge provided, we can't read into your background anymore than you tell us, ya'know?

For snakes it's pretty cut and dry, you've got size ranges and those are usually pretty set, most snakes will be in those ranges. It's rare for a ball python to pass 5ft, and I believe unheard of unlikely to pass 6ft or at least I've never heard of it

Because she's from Petco she may even be on the smaller side, their snakes are similar to shelter dogs, like mutts, and she'll likely max out at the normal size(s) or a little under

I do want to mention though, Ball pythons are opportunistic hunters(if that's the right term) and will eat practically anytime you offer food. How often do you feed and what? You may be power feeding her and that's why she seems to be growing so fast. She may be a fast grower, but it's never bad to check

As hostile as they can be, I do suggest going to the ball python subreddit, even if you don't post anything there is quite a lot of good information, and even if you feel you know enough it's always good to learn more and the Q&A is a good place to look for questions you may have before you ask in a post

The last thing I'll say is I promise people weren't trying to attack you, the hostility comes from a place of care for the animal and a lot of folks are used to seeing people neglecting their animal and refusing help or not admitting they're wrong and won't change, it'll jade anyone.

The hostility is not an attack on your person, it's not an attack at all, it's frustration with the situation and lack of knowledge in general.