Complex sentence: To keep his bar from going bankrupt, Kev becomes business partners with Mickey, but due to Mickey's selfish business manner, has to rob Mickey to get his compulsively taken money back in order to "go to Walmart to buy diapers and rash cream".
Split into simpler sentences: To keep his bar from going bankrupt, Kev becomes business partners with Mickey. Getting one from Mickey but using to rob Mickey due to his selfish business manner, get his compulsively taken money back in order to "go to Walmart to buy diapers and rash cream".