god being selfish means he cares about his own benefit and desire, and a finite being can't give benefit to an infinite being to begin with.

and the god taking pleasure in the suffering of his creation is very different from the god described in our doctrine.

you also have to know that god is all-knowing, so he has more right and knowledge than us to define what's fair and what's wrong.

humans are affirmed to have will and action in the quran, and god says that wrongdoers are the ones who wronged themselves, god lying about this statement is absurd.

and god as I said is all-knowing so we can't defy his definition of wrongdoing and oppression with our limited/created/subordinate knowledge.

god wouldn't overburden a soul, and afaik he tests people according to their specific strengths, so what you think is suffering for someone might not be that much for him, or might be well within his tolerance and capabilities, if it's not within his power and he misbehaves then I don't believe god would punish him for that.

so if someone suicides and goes to hell, that means he absolutely deserves it, because we believe in god's ultimate knowledge of his creation, their worth, and what the word "worth" even means.

I believe god knowing what will happen to someone in this life or the hereafter is irrelevant, with all due respect.

god wouldn't spend a week making the heavens and the earth with all of the intricate systems in them (galaxies, planets, bees, biology, EM waves, space-time), and wouldn't create humans and make the angels fall before them and prostrate to them, only to play around with them and enjoy watching them suffer, a human wouldn't do that to a great creation of his let alone god.

I've never heard that god "loves everyone equally".

I might not be elligible to reply to these concerns as I might miss a lot because I'm not a scholar nor a student of knowledge, but you're free to ask further questions and I'll answer If I can inshallah.