An individual who complains about their situation but does nothing to improve or escape it and would sooner wallow in it in an endless cycle.
Often claiming they are "fine" or blaming other people or events for the downward spiral a Misery Pig expects everyone to give them sympathy and has no intention of accepting that the issues normally lie with them.
"John is saying he is feeling anxious again"
"Yes but he went through this before and never got any help even when he said he would get it sorted this time"
"What a Misery Pig"