The god of the bible isn't good. He's an asshole. People say he is good in the same way people say that fairies are good, or mad dogs are good, or bad children are good. They are hoping that by saying that he is good, he won't kill them or destroy all their things or send them to hell. That doesn't make him good.
God allows bad things to happen in the world because:
He doesn't care.
Suffering in sentient beings doesn't bother him.
His wrath and jealousy are more useful in predicting his behavior than his love.
He lets the devil tell him which people or things to hurt, such as happened to Job.
He has sympathy for the devil and will allow them to destroy a herd of pigs instead of putting them back in hell, no matter the cost to the farmer.
Sounds like you should apply for God's job. You certainly feel confident you can do it better.
Let me see, God gave you life. He gives you breath in your lungs. You are on his planet with his sunshine hitting you. You seem to be healthy enough to train Jiu Jitsu. I am guessing he has put people in your life that love you. Most importantly, he offers you the free gift of eternal life if you are willing to take it.
Yep. He must be a total jerk (not).