It's a divorce, you're male, you're f*cked.
Get used to it, doesn't matter who did "the wrong".
Generally speaking, if you can keep it to a 50-50 split, regardless of what you had before entering the marriage, you are doing well.
We are in a period of time where 50% of everything you once had, 50% of anything that you gained during the marriage and 50 % of anything your future life may not be enough.
When I went through mine I almost lost my toy's to the split. Here's what went down.
Two professional's making decent $, my son grown and gone, we allowed ourselves generous allowances. She went out with her "girlfriends" partying, plays, day trips etc.(in addition to a very active lifestyle where we traveled, went out etc. as a couple.)I used my allowance for my toys, power tools, firearms etc. She used hers to go out with to socialize.
I then used those tools to do pretty extensive remodeling, etc.
She benefitted from the extra value that I built into our place an then wanted half of the property that I bought with my own allowance.
In the meantime she and "whoever" she was really partying with had spent all of hers.
Pre-nuptual gentlemen, or just do not play the game. Some are good, some are truly evil, and then there is a large segment in the middle who are messed up, and who could go either way depending on what they get caught up into, and who they hang out with. The sorry fact of things is that women are not handling modern life well. It's an epidemic, and until some sanity enters the picture both the ladies and the guys are going to be in turmoil.
The part you pay for your kids? Don't begrudge a single dime. They cost a lot whether you live with them or not. She may not use your money well, and you may have to ask questions from time to time, but they are your kids and you need to make an attempt to raise them well.
We already have too many examples of what throw away kids are doing.