got a garmin to try and after 2-weeks can confirm:

1. nothing beats apple watch when it comes to accuracy across hr and sleep (while compared to medical grade devices).

2. garmin better at gps and battery.

3. for weightlifting, just use a chest strap eg polar h10.

i have had a fenix 5 for 3 years. A bit big and clunky but mostly happy with it and no strong desire to change or upgrade it

Building https://srcbook.com // creator of the https://blockchainsmokers.xyz

they make great hardware and strong/open ecosystem.

did you try benchmarking the hr or steps against another device? thats where it failed for me