My ex-husband was better on paper than yours. Didn't put me down. Didn't argue. Didn't do much around the house, but worked hard.
But I didn't love him, and there was no way I could consider having sex with him. I knew, KNEW that I was ripe for an affair - and then the marriage would have ended horribly.
As it was, it didn't end great. But we were amicable enough to agree everything between us.
All this talk about the trauma children suffer - you are just as likely to have the experience I did. The ex husband is the one who got married, my son has a step-mother who is lovely, and a step-brother (he would never have had a sibling otherwise). Yes, you will probably not have the children with you all the time. But that means you have time without the children!
Over 10 years on, I am single, and very happily so. I would hate to still be married, and I hate the thought of how I would have deprived the ex of finding someone who loves him. Remember, staying married, doesn't come with any guarantee either. One of you might have an affair. Your partner might leave you - it doesn't sound like he likes you much if he can't hold in the criticism.
My son's view on it? When he was little he said he felt sorry for children whose parents were together, because they only got one Christmas. I reminded him of this recently, and he said he still sort of felt the same - 'I feel sorry for people who only have one family'. He also pointed out that he had been able to have double the number of pets! Like I said, there doesn't have to be any trauma from splitting the family.
Just like marriage is what you make of it, so is divorce. It's a lot easier to have a good divorce if you don't hate eachother.