He is turning 36 this year, yet he hasn't faced an opponent above journeyman level, very disappointing. Knowing his management, Szellő will probably get a shot at the (vacant?) WBO title soon, and he will probably retire after that.
I was interested to see how he went as a pro because he looked promising as an amateur. But I stopped paying attention years ago to be honest. Bit of a waste of talent thus far but just probably couldn't get the fights. I don't know how he has looked recently probably not good enough to get picked up by a promoter with any clout.