Why won't my husband let go of his ex and her kids!!!?

and people always wonder why remarrages have problems - especially with kids - the biggest problems now a days - is when there are divorces in the first place over the wrong reasons - the right reasons are usually for cheating and unfaithfullness - lieing - or a combo - and unfortunatly people get way over protective and pay attension to their own children out of protection then the spouses children and to top this off further - now a days you cant even disapline children who misbehave with out being sued or lose custody from a vindictive ex spouse or drama - so i would either accept the situation and try to raise the kids as is and hope for the best - or i would end it - and hope for the best - you know your situation better then anyone can answer - if its been only 2 years and already these problems are this bad - then i would even consider a seperation until the children are living on their own - if thats an option - im only saying this because usually someone who is 40 years of age - that doesant have a problem with drugs - alcohol - or cheating - or dishonesty - would be a keeper - and a good man - and usually for a long term - no nonsince - no games and no balony - but the problem is when you deal with exes and kids are involved - things always esculate way more then nessasary and the kids sometimes manipulate things too - so i dont know what else i can say - you both seem to be at least trying - but the ex spouses seem to be winning for some unknown reason