Three caveats
Each person has their own acclimatization rate, although with repeat experience some but not all people may improve. On the flip side, most commom is that people with prior history of AMS, HAPE or HACE are the ones most likely to get it again, especially if they continue to repeat the same circumstances.
Next, and most important to the OP is that 8000 ft is the official threshold of altitude illnesses. Going directly to 10,000 or even higher to sleep the first might can be done by some people, both others need an “intermediate” night or two or three at this level.
Diamox is not a slam dunk. It is not a magic bullet. It can help, sometimes. Best solution for OP is more time, time to properly acclimatize as he appears to need it.
