Alternatively, Karen had to make a long distance move with limited space for her things. Knowing how shit it is to ship fragile objects, she decided to donate it instead so another Karen could enjoy it.
Agreed. Her husband Randy never thought the casserole was all that good anyways. He is a tolerant man, but he won't give into that foolishness any longer.
Because Karen died and had no friends or family, all her household belongings went to an estate sale, those of which did not sell went to thrift stores.
It's possible that one time Karen didn't cook her kickasserole enough and gave everyone horrible explosive diarrhea. Not wanting to relive the terrible experience, she sold the kickasserole dish to a store. Little did she know that it is cursed, and will belong to another Karen who will inevitably give everyone she loves and holds dear a near fatal case of diarrhea. Thus the cycle continues.