Was Dk:Tropical Freeze's Difficulty the main reason it did not sell that well?

[curl-6]

spurgeonryan said:

. Even with the Wii Selling over 100 million units, Donkey Kong Country Returns still was not able to beat the SNES version. Remember the SNES version? It came out at the end of the SNES lifecycle, yet still did glorious numbers!

There were three DKC games on SNES, and DKCR outsold two of them.