I've had my Amazfit Bip (the original) for 6 or 7 years and the only complaint I have is the shitty original non-breathing silicon strap. After I replaced it with nylon strap, it was pretty much perfect.

The battery still lasts over three weeks. The display glass only has a few tiny scratches on it, despite that I've worn the watch basically 24/7 all these years.

It has all the basic functionalities I need built in and the not-so-important-but-nice ones I can get via Tasker.

And it was really cheap, I originally bought it just to see what the fuss about smartwatches was all about. But it's been so damn useful and trustworthy that I won't even consider upgrading until it fails someday.

Garmin instinct. Used they are often pretty cheap. They look like an old 80s retro digital but have a bunch of smart features. I love mine.