The phrase "road to hell" is a metaphor that means when someone's actions or choices lead to negative consequences or a problematic outcome, despite their original good intentions. Full definition
The safest road to Hell is the gradual one — the gentle slope, soft underfoot, without sudden turnings, without milestones, without signposts.» (religion.blogs.cnn.com)
Julian Sher, whose Road to Hell tracks the gang's Canadian rise, believes we all underestimated them. (thetyee.ca)
Nobody wants unbelievers to take the comfortable road to hell. (redeeminggod.com)