The Big Apple is getting pretty sour, soaring quality-of-life complaints show — and it will likely rot further under cop-hating, laissez-faire NYC Mayor-elect Zohran Mamdani, critics told The Post.

While the NYPD had trumpeted an historic drop in major crimes , millions of calls into the city’s 311 and 911 systems this year show across-the-board surges in quality-of-life complaints, data show.

Gripes about public urination, public drug use, noise, double parking, disorderly conduct and other issues that make New Yorkers miserable have skyrocketed by double digits.

NYPD compstat data from Jan. 1 through Dec. 7 showed complaints surged about peeing in public by 20%; outside drug use by 16%; public boozing by 10%, noise complaints by 15%; and double parking by 11%.

Only a couple of qual

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