ALL SEINFELD DOES NOW IS COMPLAIN!

Funnyman moans that he's not appreciated

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Jerry, who has an estimated net worth of $900 million, has reportedly been in a sour mood since his Pop-Tarts movie tanked

COMIC Jerry Seinfeld is experiencing some shrinkage — as he used to say in his classic sitcom — because his joy factor has plummeted, and sources say he's gone from life of the party to grumpy old man!

“Jerry turned his annoyances into a gold mine with his comedy performances and TV show, but the complaining used to be his secret weapon — and now it just gets on people’s nerves,” says an insider.