My WD SN850X 2TB seems to tank in read speed whenever I load into the open world. How do I stop this?

The loading screen would just hang at 95% for an eternity, which is a total mood killer when you're trying to get into a hunt. I noticed the WD SN850X 2TB random reads were spiking between 88-115ns, causing a massive backup in the loading queue. I made the mistake of running a defrag tool on it, which did absolutely nothing except eat 3GB of my drive's endurance—I felt like an idiot for that. I finally flashed the latest official firmware and forced the write cache flushing in Device Manager while keeping the power plan on High Performance. In AIDA64, the random reads climbed from 62MB/s to about 84-91MB/s, and map loads went from 28 seconds down to 12 seconds. I had a brief scare where the drive wasn't detected after the update, but a CMOS clear fixed it. Temps stayed between 42-51℃ with a smooth read/write curve. Ran a disk check to make sure the file system was clean, and now everything is fixed with memory temps sitting at 58-63℃.