Menzies has previously apologised for losing his temper at the World Championship, saying it had been a difficult time following the death of an uncle.
But the incident left him considering his future in the sport.
“It was great to win [today]. Honestly, I was so close to pulling out this weekend. I’m just not enjoying it at the moment.”
The 36-year-old added that surgeons have told him he was fortunate not to have severed any nerves or tendons but that he should gradually recover following further treatment.
“I couldn’t feel my fingers for six weeks. I had to go through surgery. I’ve still to go through hand treatment and trauma,” he said.
“I’ve made a massive mistake in my life. You can see the scar.
“They said [the feeling] will come back, but I have to live with the reputation of being a table puncher. It’s not a proud moment of my life.
“We all make mistakes. Unfortunately I made a big mistake and have to accept it.”
