Apple Watch Series 3

I have an Apple Watch Series 3 that I got about 6 or so months ago. Then the newest update for the Watch as of February 19, 2021, won’t download because I don’t have enough storage space. I was on the phone with Apple Support, yet the lady that was trying to help just kept repeating what I had already done. I tried explaining this to her. She didn’t listen. I wiped the whole Watch along with trying to delete some apps. I deleted photos and music. And it still doesn’t have space to download. The lady said to delete some of the Apple apps but I can’t because they were pre-loaded and I don’t have an option to do so. The General notification is the update that needs to be done. Why does Apple have to make some of these things difficult? Can I get some help please?