You arrive in a new town at 6pm. You open three tabs. The top result is a booking site you've never heard of, quoting a price that doesn't match the operator's own page. The reviews are two years old. The “free cancellation” link is a dead scroll. It's 7pm and you still haven't eaten.
Global OTAs are built to rank in search, not to know your trip. They don't know you've got a campervan. They don't know you hate heights. They don't know the operator at the top of their list stopped answering emails last month. You end up booking on vibes and hoping for the best.
Serge starts from the opposite end. Serge knows your trip. Where you are, how long you've got, what you're into, what you've already booked. Then the recommendations actually mean something.