No, the old man escaped because the MC felt the need to talk shit and then start to threaten the geezer with all manner of chuuni fates-worse-than-death. It's a mistake made by both amateurs due to hesitation and people who can't keep their head cool. Canaan only got the chance to interfere because Tsukuru was taking all the time in the world to kill the man. What's the point of torturing him or any of that shit? I mean, the MC is alive because the local humans didn't kill him on the spot (or around the corner for the sake of the other summoned people). Instead they sent him to a place that's "sure to kill him". Well, shit, it didn't kill him, it only made him exponentially stronger. Now the MC was repeating the same mistake of not killing the geezer immediately, instead he gave the man all the time he needed to prepare his escape.