I Hate God

I've always relied on my faith in God to see me through the hard times.
After my husband left me, I finally decided that faith in a God that allows this to happen is a waste of time.
I've always heard, "When God shuts one door, He opens another". Well I have been dealing spiritually as well as emotionally, with doors slammed shut on me and no new ones opening up all my life. I'm in my mid 50's and this loss has done me in, especially after being with this man 15 years.
God is supposed to be all powerful and can even outwit Satan, yet he lets some of us suffer in torment while the other person goes on with their life and gets the happiness that should have been for us.
I'm finished looking up to such a vengeful God.