As Sunday's home opener at Paul Brown Stadium started to get away from the Cincinnati Bengals, it didn't take long for fans to voice their disapproval.

There were boos.

There were early exits.

In the second half, the lower bowl of seating was occupied mostly by San Francisco 49ers fans.

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The frustration of a 41-17 loss wasn't limited to the stands. It found its way into the locker room as well.

After the game, Bengals running back Joe Mixon was asked about hearing boos from the fans.

"That's definitely frustrating to see that," said Mixon, who finished with 11 rushes for 17 yards. "We down 11 (points), I wanna say in the second quarter and then you see hella fans leaving and booing.

"At the end of the day, we wanna win, too. If they feel like they can do it better, then come try out."

Head coach Zac Taylor said, "We were playing poorly in all three phases. It was not anything to be excited about if I was a fan in the stands that paid money to come to that game.

"It's on us to fix the issues we have and play better and the fans will rally behind that. But right now, we didn't give them a good enough product to be excited about."

Sunday evening, a few hours after the Bengals had left Paul Brown Stadium, Mixon tweeted, "To all my fans and Cincinnati fans I'm sorry for the performance that I displayed for the past two weeks. I promise I will get it right and we will be better!"

In a separate tweet, Mixon added, "Love y'all!"

Quarterback Andy Dalton was asked about the fans' noticeable displeasure.

"It's one of those things where we want to put a good performance out there – something they can cheer for," said Dalton. "I've never understood booing. I don't know what that accomplishes.

"But, at the end of the day, we have to play better and give them something to cheer for. We want the fans behind us, and we want the city behind us. It only gives us an advantage. We want a home-field advantage.

"Unfortunately we didn't play well today and didn't give them too much to cheer for."

After a tight loss on the road in Week 1, it was a different Bengals team on display at home in Week 2, which is probably why fans were so upset.

"I don't think nobody's worried about Week 1, but at the end of the day, the way I see it, we ain't come to play," said Mixon. "It's gotta motivate me. I got a lot of catching up to do. I gotta figure it out. I just gotta look myself in the mirror."

Mixon's best runs Sunday were nearly all negated by penalties.

"We can't shoot ourselves in the foot and play behind the chains," Mixon said. "We just gotta figure out what's going on in our building and take care of the stuff we can control and go out there and execute."