KFC was ranked the worst-rated fast food chain in the U.S. as customers complained of poor service and bad food at its restaurants.

The chain, that specializes in southern fried chicken, has the worst average customer review score of fast food restaurants across the country, price-monitoring website Pricelisto found. Other fast food outlets were criticized for greasy and burned food, lack of variety on menus and slow service.

Fast food chains were ranked from worst to best by national averages by Pricelisto using TripAdvisor statistics. So, what is the worst food chain in America?

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1. KFC

Coming in first on the list of America’s worst food chains is Kentucky Fried Chicken, or KFC. The chain had an average customer review score of 2.89 out of 5, with Arkansas and Idaho ranking it the lowest of any states, rating it just a 2.57 out of 5.

Customers said they had received “bad service” and “bad food” from KFC locations and that there was a general “very poor management attitude.”

2. McDonald’s

McDonald’s came in second on the list, boasting an average customer review score of 2.99 out of 5.

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The states that ranked it the lowest were Alabama and Iowa, giving it scores of just 2.68 and 2.9, respectively.

3. Burger King

Burger King was third on the list, averaging a 3 out of 5. Alaska and North Carolina rated the chain the lowest, with the former giving it a 2.67 and the latter a 2.81.

Customers complained that the restaurant had “no variety” and that, often, the floors inside locations were “greasy and slick.”

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4. Church’s Texas Chicken

The chain coming in fourth on the list isn’t one that’s found in many areas. Church’s Texas Chicken garnered an average customer review score of 3.08 out of 5.

Missouri gave it a low 2.59 rating and Nevada rated it 3 out of 5.

5. Long John Silver’s

Fast-food seafood chain Long John Silver’s rounded out the top 5, with its average customer review score coming in at 3.16 out of 5. The states that ranked it the lowest were the port states of Maryland and Delaware.

Maryland gave the chain a rating of 2.28, while Delaware ranked it 2.53. Customers called it “horrible food” and said their entire experiences were “a complete waste of time.”

6. Taco Bueno

Another chain that isn’t found everywhere, Taco Bueno came in sixth place, boasting a 3.24 rating out of 5. Oklahoma gave it its lowest rating at 2.9.

7. Taco Bell

Taco Bell came in seventh place in the ranking, with just 3.25 out of 5 stars for its customer review score. North Dakota and Idaho rated it the lowest, with the former rating it 2.63 and the latter giving it a 2.94.

Reviews for the taco chain said locations had “messed up the food” or that customers “would not come again.”

8. Hardee’s

Burger joint Hardee’s took eighth place in the ranking, just barely above Taco Bell and Taco Bueno with a 3.27 out of 5 review score. Customers said the food they’d received was “hard and burnt,” while one review in particular stated, “This place is a disaster.”

Iowa ranked it the lowest, giving it a 3.11, followed by Maine, which gave it a 3.13 score.

9. Pizza Hut

They say you can’t out-pizza the hut, but according to the data, you can  the pizza chain came in ninth place in the ranking with a 3.28 out of 5.

Alaska gave the joint a measly 2.68 rating, making it the lowest review for the chain.

9. Sonic Drive-In

Tied for ninth place with a similar 3.28 out of 5 review score was Sonic Drive-In, the chain that often features servers on roller skates, who bring out food to waiting vehicles.

California rated Sonic Drive-In just a 3.05 out of 5, making it the lowest-rated chain in the entire state.

Why are the chains on this list rated so lowly?

A spokesperson for Pricelisto said customers often leave bad reviews if they received poor customer service, had low quality food or were forced to wait a long time.

“While negative reviews can be frustrating and disheartening for business owners, they can also serve as valuable feedback to improve the customer experience overall. Some of the most common complaints were a lack of variety in food, unhelpful or rude staff and unclean restaurants,” the spokesperson said.