Although you may sincerely believe what you've written, I hope you won't be close-minded about it or refuse to reexamine it. After all, if God isn't perfect (as you contend), that means He can make mistakes–and therefore it means He can't be trusted.
But the Bible is clear: God is perfect, and therefore we can trust Him–even for our eternal salvation. The Bible says, "As for God, his way is perfect; the word of the Lord is flawless" (Psalm 18:30). Not only is God perfect in all He does, He also is perfect in all He is.
Take, for example, the case you cite of Adam and Eve. Why did God make them so they could sin and do wrong? The reason is because He didn't want them to be puppets or robots. He made them with a free will–for only then could they freely love Him. Yes, it was a risk on God's part–but if He hadn't taken it, Adam and Eve (and you and I) would be robots, not humans.
I can't help but wonder, however, if your real problem is something deeper. Down inside, are you refusing to believe in God out of pride, or perhaps because you want to run your own life? Whatever the reason, I pray you won't let anything keep you from Christ. God loves you, and the greatest privilege you will ever have is the privilege of knowing Him. Open your heart and mind to Christ today.