That was just the beginning--
If 17 and 18 had actually GOTTEN OUT OF THERE while Tien was stalling Cell...
If Krillin had actually gotten 18 out of there instead of checking her out on that

when he had the remote...
If Trunks hadn't gone all Deebo and bulked up too much to the point that he couldn't catch Cell...
If Vegeta hadn't LET Cell absorb 18 just to have a stronger fight...
If Bulma had actually TOLD 16 that she removed his bomb...
If Goku hadn't given Cell a Senzu bean...
If Gohan had murked Cell when he had the chance right after going SSJ2...
EDIT: If Goku hadn't taken ten years to say his goodbyes before he teleported away with an about to detonate Cell...
If he had grabbed
King Kai and TELEPORTED OUT OF THERE before Cell exploded...