2 month old Apple Watch SE draining battery in 5 hours

Two month old Apple Watch SE purchased from T-Mobile when upgrading phone May 2023.

battery draining every 5 hours from full 100% charge.

took off charger 7am, back on with 8% battery at 12:30. Put back on charger until it reached 100% at 3pm, and just took off now at 8:45 with 4% battery life.

i am on watch os9.6.1 and was on watch 9.6 prior with the same problem.

one month ago I took my watch swimming in a no deeper then 6 foot chlorine pool for the 3rd-4th time since I owned it. On that day, my watch shut down and began “boot cycling” by trying to load the Apple screen and then shutting off, the reloading Apple logo, and rinse and repeat.

I drained the battery completely, unpaired the watch, charged it, repaired it, and began to experience battery issues.

I have sent it into Apple service via mail 4 different times, only for them to return it to me 4 times. “Sorry but we don’t service batteries over 80% health.”

in my battery settings on my watch, my battery health states it’s at 100%. But I cannot believe that an almost brand new watch is needing to be recharged every 5 hours.

I go for 30-45 minute runs 3 times a week but otherwise, that I know of, my watch is not engaged in any specific battery draining activities that I know of. I have no sound playing from my watch for alerts, I have tried hard rebooting and unpairing and repairing the watch numerous times, restoring from backup, not restoring from backup, etc.

I am at my wits end and Apple seems to be no help. I have avoided going to a Genius Bar for an appointment as the closest one is a 30 minute drive each way. I realize this is not that tremendously far, it’s just honestly inconvenient and frustrating for me to have to bring the watch directly to them to hopefully have some different result.

if anyone has any thoughts or suggestions please, anything would be appreciated