So many monitors run on similar controllers internally - it would be absolutely wonderful if one or more of those had open source firmware so these bugs could be fixed
On my monitor (~5ish year old Dell) I have the "Deep Sleep" option disabled and it suits me very well like this.
I found that disabling all forms of eco saving and deep sleep settings will make the monitor wait for the Mac when waking up.
I no longer have to keep hitting keys. It still takes a while to wake up, but at least it's predictable.