Most people end up failing to go to heaven while they enjoy and do things they like since that's what they like. They live engrossed in things of the world, such as drinking, smoking, love for the opposite sex, sexual pleasure, sleep, having fun, worldly culture and arts, sports that they like, money, their hobbies and etc. They cannot quit them, so they continue doing them. That is why they don't like Heaven, don't even try to go to Heaven, and don't live their lives to go to Heaven. As a result, they end up unable to go to Heaven.