Am i really this bad of a swimmer?

I just got back in the pool after 17 years but my technique and form never left (i was a competitive swimmer for a club for 8 years as a kid)

I swam 2km in around 1 hour which apparently puts me in beginner catagory on this website for my age group (28)... I find this very hard to believe surely?

https://swimminglevel.com/swimming-times/2k-times#:\~:text=What%20is%20a%20good%202k,across%20all%20ages%20and%20genders.

They define beginner as better than only 5% of swimmers. I dont want this to sound like i'm bragging but i'm quite literally the best swimmer at the pool every time i attend, its mostly elderly people doing above water breast stroke or people with terrible form.. I know this sounds horrible but i dont know how else i can get my point across.. am I really that awful at swimming?