If Jesus is so great, why are some of his followers such jerks? and I don’t go to church anymore because there are so many hypocrites.

In reality, not everyone who claims to be a Christian is one.  Jesus Himself warned that not everyone who professed Him would enter into eternal life with Him.  At the final judgment, He said they would be greeted with "I never knew you,' and would be sent away from Him for eternal punishment.  Are you prepared for that yourself?