When philosophy becomes religion

Something I've noticed with so called "philosophies" that view life in a negative light, is that over time, they slowly morph and grow into some new age religion. Sure, they don't worship a deity of any kind, but they worship and hold an idea so strongly, they will call you evil for disagreeing with them. I'm talking about one in particular but I'm not naming names. My main point is that no matter how "neagitve" one views life, they will always fall back on something to give them purpose. Yes many people know life is meaningless and that they suffer for nothing, but then they decide to try and find some form of purpose, a goal, and that beings to fill them with hope. I'm not talking about pessimists, as most pessimistic philosophers knew life tucked and knew they couldn't do anything. But some see that and feel they have some job or purpose to save us all! Humans cannot live or stay sain without something to give their suffering meaning, so they worship ideas as absolute truth, because how else does it make sense? How else can they justify continuing existing other than they don't have the gumption to leave? Don't let those who say they view life negatively fool you, because hope and optimism still stick to their mind like a parasite