He offers free will and then punishes you with eternal torture if you freely choose some course of action that displeases him. He decides that he needs things to worship him constantly and for all eternity so he creates angels, many of which decide to not do that and, so, after realizing that whole experiment was a failure, he tries again with mankind. This time, though, he sets a trap for mankind before man is even created, like a baited hook and a trout, which makes no sense unless he's a person with emotional/neurotic issues (feel free to think outside the box and tell me how that wouldn't be the case)-- because none of the good creators any of us know (good mothers, good artists) set their creation up for failure/destruction from the start-- my mom never put baby food or my favorite toy in a set rat trap, for example.
God is supposed to be all powerful, but he doesn't have the power to stop his emotional need to be needed, loved, worshiped.
Kings for all time have viewed themselves as being worthy of praise, as it being a rightful and just debt owed. God behaves like human kings. Since he appears in stories written by humans, it's not surprising. And, much of his odd behavior didn't seem odd to people who were used to kings acting like that their whole lives.
Just wrapping your brain around drowning basically your entire creation (save a very few) is beyond comprehension, except to see him like an artist that has created some work of art that he has totally screwed up bit by bit and ultimately has to toss it in the trash-- except God isn't supposed to make mistakes and when God trashes his creation, he's killing a lot of babies and young children and mentally and physically handicapped people, and that makes it hard to reconcile with his being all-good.
There are many basic things about him and what he has done and what he has promised to do that demand some really weird outside the box thinking. You're welcome to assist me.
Your mother may have allowed you to touch something hot so you would know the danger of fire, or smoke a pack of cigarettes when you were curious so you would be made sick by it and lose your curiosity... Sometimes the best teacher is experience. Ask yourself... what is God trying to teach you?