mate,
i had the same issues and thought the same as you "clio16v brakes are crap".. as a result i slapped on some Tarox G88 front discs (40 groove type) with some DS2000 fast road pads... 500 miles later.. braking was still sh*te. Took the car in for a service.. had my braking system bled, this fixed the issue! - sorted
now when i brake hard (after pads warm up) i can lock the wheel at a touch of the ped.. i suggest you flush your fluid system.. if things are still bad, replace your hoses with the braided type,
James.