Practice playing Neon nonstop or countering Neon nonstop.
At Champions Seoul, DRX only ever lost maps when BuZz was on Neon or when the enemy duelist was on Neon. Specifically on Haven, Sunset, and Icebox.
Not sure about BuZz on initiator flex though. Might be easier to make him keep practicing or do what DRX did during Chamber meta and try to hard counter.
Or, just bring back Rb. I miss him and his Neon...