JACKSONVILLE, Fla. -- It took 12 weeks, but Jacksonville Jaguars receiver Allen Robinson finally couldn't stop himself.

Angry at another instance in which what appeared to be an obvious pass interference penalty wasn't called in the fourth quarter of Sunday's loss to Denver, Robinson yanked off his helmet and yelled at an official. He was hit with an unsportsmanlike conduct penalty and went to the sideline seething.

"That's not really me, but it's been frustrating," Robinson said after the 20-10 loss at EverBank Field. "It's been frustrating, and not the amazing officiating but just all around. Sometimes you've got to let it out, and that happened.

"I've never been this frustrated playing the game of football in my life."

Allen Robinson's emotions boiled over in Sunday's loss to the Broncos. Logan Bowles/USA TODAY Sports

It's understandable. Robinson had a breakout season in 2015, catching 80 passes for 1,400 yards and a franchise-record 14 touchdowns while making the Pro Bowl. He's had a much harder time in 2016. He's on pace to catch nearly the same number of passes but finish with more than 500 fewer yards.

It also seems there's a play or two every game in which he's being held or interfered with that isn't called. It happened numerous times in Week 1 against Green Bay -- the league later admitted to the team that the game officials missed those calls -- and has been nearly a weekly trend. It happened against Buffalo on a critical third-down late in the game in which a Bills defensive back grabbed his jersey to prevent him from making a catch and it happened at least twice against the Broncos.

"I'd rather not talk about this amazing officiating that we've had throughout the course of the season," Robinson said. "I have no idea [why he's not getting calls] but it is what it is. I just try to keep playing. I try not to get too frustrated. I got a little frustrated today but other than that I've just been trying to keep my head in it and try to go out there and make some plays."

Let's be clear: Robinson isn't the only receiver in the league who believes he's not getting calls. It happens every week in every game across the league. He's just as frustrated about the offense's lack of success in 2016 as he is his own struggles. Plus, the Jaguars are 2-10 in a season in which they were supposed to compete for the AFC South title.

Still, he wants to make plays the way he did last season because he knows that will help the Jaguars win games and is aggravated that he's not able to do so. Catching three passes for 31 yards against the Broncos isn't going to cut it.

"I know it's frustrating for him, because he's been getting kind of hammered with guys draped all over him and the lack of calls," quarterback Blake Bortles said. "I know it's got to be frustrating for him, especially as competitive as he is, as badly as he wants to make a play and make a difference. It's tough. I wouldn’t know what to tell him. He's going to play as hard as he possibly can on every single play. He's always done that.

"Sometimes you get the call. Sometimes you don't. You can't worry about that. You've got to just try and make the play."

Robinson said he's going to start being more physical against defensive backs -- a little shove, more arm fighting, maybe a surreptitious jersey tug of his own. He has to try something else because what he's doing clearly isn't working.

"Maybe it's me," Robinson said. "Maybe I should start in practice upping my physicality. I'll take a look at that as well. I'm not going to say it's not on me, because obviously I guess it is. I've got to go in the lab and try to figure something out.

"At the end of the day, it's a physical league so again I can't always look at the opponent. I've got to look in the mirror, so maybe I need to start upping my physicality."