I’m a Costco member and I’ve never had to return anything I’ve bought there. Costco can and should tighten up their return policy to prevent this kind of abuse. The costs incurred by accepting used furniture from people like this will be passed on to the rest of us who hold Costco memberships.
I agree.
Returns should be with reasonable limits.
Defacing or damaging something should immediately disqualify it from being returned.
And after 3 years of use, no way unless it can be proved to have been actually defective. You got your money's worth out of it.