visit to the swimming pool

About Apple Watch water resistance -

https://support.apple.com/en-us/HT205000

ASC - Late 2012 Mac mini, macOS 10.14.6; Watch, series 5 GPS/cellular, watchOS 6.2.8; iPad Air 2, ipadOS 13.6.1; iPhone 8+, iOS 13.6.1; TV 4th Gen, tvOS 13.4.8;  HomePods, audioOS 13.4.8 and Airport Express w/ Airplay 2

Ranting here doesn't do a lot of good. Apple is not here. This is a user to user forum. Most of us will ignore your behavior.

As to the watch's water resistance, Apple doesn't have control over how you use the watch nor the conditions to which you expose the watch, they can only tell you what the watch was manufactured to withstand. The fact that you may have continually subjected the watch to a situation which was corrosive to the watch's water resistant seals is out of Apple's hands. That is all on you. Apple has no control over the chemical environment of the pool in which you swam, nor how often you subjected the watch to that environment. Nor any control regarding other environments to which you may have subjected the watch prior to or during the times that you used the watch in the pool.

I have an Watch series 3 that will be 3 years old next month. It still functions as it did the day it arrived in the mail. But it also hasn't been subjected to the conditions that you appear to have subjected your watch.

The water resistance Apple Knowledge Base article to which I linked states a lot about the resistance and many things that can affect that resistance. You may have compromised the seals on your watch long before you went swimming with the watch.

Yes, Apple Watch is water resistant but not water proof.

Can you show where it says waterproof?