The circumstances you have told us of go some way to explaining even more about your initial anger at wanting to bop "God" one.
There's a lot of us have been there Stevie. Divorced but with my chldren now all adults I have learned quite a lot along the way. My "God" doesn't need any organised religion, most of which I find incredibly hypocritical. I just find that at times in my life when I've been at my lowest something - maybe only a smile from a stranger - has happened to pick me up. "God"? The jury's out. But what I have learned is to value myself more than ever before. Although grotty thngs still happen to me I find myself just looking for the event that will "break" the run of bad things. And it comes! Weird, hey?
I don't have a partner in my life but I am blessed with family and friends who are amazing. Do I really need more than that? I'm neither asking or looking for more. If it comes, it comes. Like I said earlier, when I die, if I meet "God" it'll be a bonus. He'll have to take me as I am like everyone else does!
Focus on you and your children. They are all that matters. I still get pangs when I hear my ex and his wife are gadding round the world again while I'm stuck here but, hey, **** happens. He doesn't have my friends and family. I don't know whether he has the degree of peace of mind I now have but I'm not much bothered. That feeling of "it should have been better for us" that you may be experiencing comes and goes but gets easier. Maybe we have to go through all this **** to make us who we are.
Love your kids - don't hide yourself from them. Give them positivity and you'll get it back. Give them your time and attention and they'll not have to fight to get it. Give them values and boundaries and they'll have security. Just look for the best and it'll come.
All the best - if I made it this far, you can! x x x