Over the years, Russians have had some catastrophically bad engineering failures, perhaps none bigger (literally) than the Ekranoplan. In 1987, they began construction on a 350 ton ground effect “ship”. Powered by 8 jets, this thing didn't even have landing gear, instead it was designed to land in the water - in waves up to 15 feet tall.
Ekranoplan carried 6 Moskit cruise missiles with NATO 'sunburn' classification. Sadly the partial disarmament treaty Russia signed with the US put this monstrosity on hold and it never saw its maiden flight, which would have ended in a spectacular water-tastrophy I'm sure.