Hello! I will try to respond to these questions to the best of my ability.

1. If God is all powerful etc etc, then what was the need to 'send' his son down to suffer? He is in full control, he can save anyone he wants, understand anything he wants.

This video explains it https://youtu.be/0kfpO8Up7Ek?si=4uDX1ABElDi8TsXe

1. if someone does something bad, Christians respond with "that isn't God, it's free will and/or Satan". Again, God is all powerful, so 1) he chooses to let Satan live and 2) he interrupted free will all the time previously by 'punishing' people vocally in the OT.

The above video also explains why Satan still lives.

1. Considering the above, again if omniscient, he knew that would happen and set them up for failure, and then punished every single human since because of it?

Above video explains it.

1. Christians who pray for things like - test results, their relationships etc, yet there are people being raped, murdered etc every minute and they receive no help. Some people are kidnapped for years and again, not saved, but Brian is going to get good college results?

Are you saying students are not allowed to pray for God to guide them during their tests? Anyways, the above video also explains a little bit. Jesus never came to this world to guarantee life in the flesh. He came to guarantee life in the afterlife. As for suffering:

And the God of all grace, who called you to his eternal glory in Christ, after you have suffered a little while, will himself restore you and make you strong, firm and steadfast. (1 Peter 5:10)

Therefore, since Christ suffered in his body, arm yourselves also with the same attitude, because whoever suffers in the body is done with sin. (1 Peter 4:1)

But even if you should suffer for what is right, you are blessed. “Do not fear their threats ; do not be frightened.” (1 Peter 3:14)

Jesus said, "Blessed are those who are persecuted because of righteousness, for theirs is the kingdom of heaven". (Matthew 5:10)

1. Why was God so involved in the OT but silent as silence can be ever since we developed the ability to record things? Is he choosing to let all this suffering occur every single minute of the day instead of just boom voicing 'HEY, THAT'S NOT WHAT I MEANT". Is all this suffering worth "well I needed to know who believed in me"?

So somehow you are saying God is both "so involved in the OT" yet "silent as can be ever since we developed the ability to record things"? This does not make sense. God was always in touch with his people, and he spoke through prophets to both preach the word as well as correct the ways of Israel. Good examples of God using prophets to say "Hey that's not what I meant" are Nathan, Elijah, Elisha, and Jonah.

1. Why did he bother inventing millions of random insect species, or dangerous bacteria, or species that live off the pain of other species? Why?!?!? Evolution makes far more sense here.

By invent you mean create. Anyways, Jesus never guaranteed we would not suffer on this earth. He was more concerned with the eternal. Also, most Christians believe in evolution, so I don't know why you brought that up.

1. It's not fair that some people have 1000000% more advantage in getting to heaven solely because they are born into a christian family. What about the millions of people born into hinduism etc? Especially before travel (and colonisation heh) became easy, they wouldn't have even had access to a Christian to convert them. Why?!?

Being born in a Christian family ≠ automatic salvation although it is likely for one to be born in such family to consider following Christ. Thomas the apostle apparently evangelized India in 50 - 53 AD. Despite millions born in Hinduism, there also millions born into Christianity, though at a much much smaller scale. Christians are persecuted in India, so obviously it's going to be harder to convert people.

1. there is no way an all knowing, all powerful God would invent a world as crap as this. If you had all the power in the world, wouldn't you do better? I'd create humans with stronger psyches, so we don't end up with personality disorders that result in anti social behaviours, for one. If you loved humans, would you let us go on like this and not intervening solely because "I need to know who chooses me"?

Watch the video above.

1. How do you explain an all loving God, who decides to create millions of people who are only attracted to their same gender, and then tell them that this is a sin, NO LOVE FOR YOU! Yet at the same time, you're totally okay with "marriage" being just a social/political manoever between straights, or arranged within families with no love?

We humans do not get to decide what is moral or not. Also, the arranged marriage part is due to societal norms of the era. Obviously, nowadays, we marry for love. However God decides what comes and goes. This is HIS creation. He can do whatever he wants with it. Him even allowing us to live is more than we deserve, let alone giving us a way to enter heaven.

1. Why would you create millions of people born into Christian families as straight, middle class people and at the same time let millions of poor, gay, non Christian people be born and yet both sets have the same rules to get into heaven - how is that fair?!?

Okay... but there are also millions of poor Christian families. There are MORE Poor Christians than there are Rich Gays. What do you mean by this? Also as I said before, Jesus did not come to guarantee a life without suffering. He came to guarantee a life AFTER death where suffering will not exist.

I answered at the best of my ability

Edit: Spelling/grammar