Maybe he should have made sex and masturbation painful and ONLY for reproduction and survival purposes so that when people did have a baby, it meant something?

That would eliminate porn, prostituion, homosexual acts, pedophilia and child sex rings, beastiality, masturbation, unwanted pregnancies and abortion right off the bat... and A LOT of sin with it.

Start here.

He makes a failed pair of humans to start with and somehow, everything is OUR fault and WE are the sinners?

That's like designing the Ford Pinto and blaming the drivers for getting rear ended and having the gas tank explode, no?

God failed and maybe that's where Satan's anxiety comes from and why he said, "F*ck this, I'm outta here".

He worked for the biggest, egotistical narcissist in the known universe and when HIS plans get screwed up (like making humans), we are told, "God is perfect and Lucifer is the reason why man sins"?

Really stop and think about this for a second... God screws up, but he's the boss and has all the power (like Thanos), who's going to challenge him?

That's all I can say on that.