Funny thing. A lot of seasoned guys in your average gym are really bad at cutting off the ring too because they dont have to because they have length, quick, or whatever reason. Its why even at the pro level ull see great fighters be bad at it since it would take a cat with perfect footwork and movement to even have them have to cut the ring off well. Most recent wxample I can think of was that teofimo fight.
My trainer is a shorter guy for his weight class so hes very very good at cutting off the ring and he was teaching me and that is hard as you have to have some good ass footwork and instincts cuz punches coming too and u need to maintain the ability counter and shyt as well as moving them where they need to be.
Its not shocking in ufc those dudes be looking super lost against an elusivs guy half the time