My desired features are basically yours, plus notifications. I've found the Amazfit Bip to just about fit the bill. I wish it had a bit more health tracking, but the ~month of battery life makes up for it. Watches with batteries that last a week are what confuse me; it's too regular to forget about, and too infrequent to easily remember. I could probably get used to a daily charge though.
The big problem is all the menus are cluttered with buttons for features that I will never use. I'm sure every feature has someone who will use it; but I certainly won't.
(It's not like it's 1995 and half the fun of a brand new computer is figuring out how to use it.)
Probably the best way to solve the problem is to make it easier to disable (or ignore) most of the features.
I wanted a long battery life (e-ink would work) minimal watch with health tracking only. In the end I just chose the Apple Watch SE, switched off all phone & message notifications and made recharging part of my daily routine. It’s easier to adapt than find the perfect device and I’ve found many useful features on the SE that I wouldn’t have chosen on my custom smart watch.