There is a vaaaast difference in quality across the Ikea range. I too had a bulletproof Ikea desk that lasted me over a decade and was still in excellent structural condition when I got rid of it. It was a single large slab of wood (not particle board) with steel legs that screwed into a steel frame with large steel screws. It cost $200 at the time but what with inflation and everything else would probably cost over $300 now.

I just looked it up and it was the Galant desk with T-frame legs, sadly discontinued in 2014.