Health Snapshoot getting worse with time

Let me tell you that SpO2 works fine, same with HR, It is the HEALTH SNAPSHOT that is malfunctioning

the same here. I'm surprised that the HRV app requires a chest strap, but the Health Snapshot thinks it can be done without one.

Have that occasionally - it seems to be tied to movement. I suspect you are not staying completely still.

 I tend to trigger it before getting out of bed - nice way to spend 2 mins collecting my thoughts - do not even raise hand or twist wrist - just be completely still. When I tend to raise/twist arm to see if its done, and or my dog comes in to say hello that is when it tends to not record the HRV data.

Same thing here. A glitch probably. I expect it will be addressed, hopefully when 8.13 is finalized. Coincidentally, I was just taking a Snapshot when I opened your posting. Got the SPO2 but no HRV.

still like a hard table... I even tried laying down in bed

Are you running the beta software? I just got all the measurements on an Epix that is not running the latest beta, but no HRV on one running beta 8.13. Yes, I have two, temporarily. 

Well, you are complaining about your watch that you chose to install BETA firmware on.  If you choose to do that you can't complain, you can only give constructive reporting of issues. I am also not showing HRV in my snapshots since installing the beta, but I knowingly did that realizing they will fix it, so just relax or roll back, those are your choices at this point and don't install the beta next time.

Sounds like maybe Garmin just isn't for you then, goodness.