Isaiah 45:7 : I form the light, and create darkness: I make peace, and create evil: I the Lord do all these things,"

God made the evil.

As God is the source of all life and good

If this is what god said, then it's like Jeff Bezos running ads saying he's a good guy.

I mean, that doesn't really fix it if you have an actually omnipotent diety though, because that diety would be responsible for, well, everything, to include what the results of rejecting that diety would be.

Even if he wasn't made up, the god character from the Christian Bible is the most evil, fucked up, bastards in all of fiction. As if murdering the entire planet (minus a hand full of people) wasn't enough, he then demanded the rape of countless women due to the actions of their fathers and/or husbands. So don't go around talking about your imaginary friend being this shining moral beacon. Your moral system and foundation of logic is built upon circular reasoning created by a bunch of nomadic biggots jealous of everyone around them.

I pray to Russell's Teapot you actually read this response, think long and hard about it, and don't just get caught up with "erm akshully they were Nephilim"

Does original sin exist?

But wouldn't making us in such a way that their absence amounts to eternal torment also be a deliberate choice by an all powerful being?

Ah, so we can kill people for not doing what we want, as long as we warn them first?
Then if they don't do what we say, their death was self-inflicted.

Seems reasonable.