I think some of the sleep issues can be due to windows running background updates which prevent the system from going all the way into standby when on AC.
This does not explain why you cannot wake from sleep however.
Are you running into the issue primarily on AC or also on battery?
Just for some background modern standby sleep has 2 different phases, 1 where the system is still fully on but the screen is off, and 2 where the system is in a low power sleep state:
From: