I've hated this level for a while now due to the starting strat, but after grinding I got better at it. I also felt that locking my FPS at 144FPS helped a bit with getting the beginning more consistent, although maybe it's just placebo, I don't know.
I also approach the first Wall Boost from an angle (similarly to Annex 7) to try and help get a deeper angle for a faster Wall Boost. I then starting trying to bunnyhop off the platform before the 2nd Wall Boost, just to see what would happen, not being sure if it would be faster. Then as it happens I got a godlike run and finished. So it turns out it indeed is faster!
I didn't expect to beat this record, but as fate always has it I figure out something new to help me achieve my goal. I'm super happy to reclaim the record as well as push the time below 8s!