I'm glad you asked. But has seriously no one answered this question for you, and have you not taken the time to watch videos and the like? It is a seriously important question too.
Here is a video, please actually watch it, and don't skip it over. If you REALLY do want the answer, and aren't just trying to refute this meme, then take the due time of understanding.
https://www.youtube.com/watch?v=6LFzk1afiD8
Here is one of my explanations:
God loves us so dearly. To help you understand just how much, Lewis puts it into perspective:
imgflip.com/i/6znxfn
Since He loves us, He gives us free will, to a certain extent, and we can debate that too.
Love is not forced. God gives us the OPTION to love Him. We can say "F you God" or we can admire and serve Him for all that we (only some people are able to though lol) see Him doing. So again, He gives us the option. He doesn't force us to love Him. And in fact, that would not be love! Forcing someone to love you? That isn't a thing that exists. So when he allowed Satan to rebel, and all of us with Him, the result is destruction and chaos as we see today. And besides all of his good works, which very few people will want to acknowledge, and cannot see, the destruction and chaos that children especially feel is no God's fault. It is our father's and their father's fault.