Just when Arsenal fans thought they might have a chance of winning something, their season came crashing down in March again.
It's still mathematically possible for the Gunners to win the league, but it looks like it will be a difficult task to catch up on high-flying Leicester.
But where did it all go wrong for Arsene Wenger's side?
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LAST-MINUTE EQUALISER AT ANFIELD
This match effectively began the 2016 collapse. An injury-hit Liverpool side should have been brushed aside by Arsenal, and with a few seconds to go until the full-time whistle it looked like they got over the line.
Yet the unlikely hero for the Reds, Joe Allen, hammered in a 95th-minute equaliser to devastate the away support.
Wenger received heavy criticism for bringing on Mikel Arteta late on in the game, who failed to follow Allen's late run into the box.
This last-minute heartbreak sparked a terrible run for the north London club as they picked up just two points in their next three matches. In fact, they have only won four times in their last ten matches since the 3-3 draw at Anfield.
If there was any result to look back on which might have determined the poor run of form for Arsenal in 2016, it is most certainly this one. You can only wonder where they might be now if they had seen out this victory.
4-0 THUMPING AT ST MARY'S
A performance that has pretty much summed up Arsene Wenger's tenure in recent years. The Gunners provided a disturbing answer to all the questions about whether they can truly win this title.
Do they have the mental toughness to nick a result in a tough away match? Do they have leaders in the team who can be accountable? A 4-0 thumping tells you all you need to know.
Victor Wanyama put in a destructive performance, bullying the Arsenal midfield for most of the game. A relentless performance from a player Wenger probably should have signed in the summer.
One of the most disappointing aspects of this game is that they came into this match on the back of one of their best displays of the campaign against Manchester City.
Only for that result to effectively being thrown away and meant the Gunners missed the chance to go top of the table. It hurt, even more, when City hammered Sunderland on the same day.
UNITED YOUTH STUN ARSENAL
Another match which highlighted one of Arsenal's traits - complacency. When the Manchester United line-up was announced, most people were struggling to recognise some of the names on the team-sheet.
This was an opportunity for the Gunners to get back on track and take charge of the title race, but instead of teaching the United kids a lesson, they were taught one themselves.
Not only were United playing a youthful side, they had been struggling all season. If Wenger's side treated this game like they treated the reverse fixture, then the Red Devils could have been in for another humiliating defeat.
Nevertheless, Marcus Rashford stole the show, and although the north London club threatened to get back into the game, they never looked like getting something from the match.
An excuse many Arsenal fans used throughout the season was the injuries they frequently picked up, but that excuse didn't stand up here.
Mesut Ozil, Alexis Sanchez, Laurent Koscielny and Francis Coquelin all started which underlined that their current squad simply isn't good enough.
SOUTHAMPTON FRUSTRATE AGAIN
It is often labelled that Arsenal have struggled in the away matches against the big sides, but the Gunners have also slipped up against the so-called smaller sides at home this campaign.
This led to many Arsenal supporters wondering why Wenger didn't sign a striker in the summer. Olivier Giroud, Ozil and Koscielny all missed glorious chances to put the game to bed.
Sometimes you do miss chances, but the Gunners once again started in a pedestrian-like manner. Instead of killing the game off early on, they slowly built from the back and let the Southampton defence settle into the match.
Too many times this season, the north London club have started slowly. Leading to points being dropped against West Ham, Liverpool and Chelsea at home.
A quick mobile striker such as Dortmund striker Pierre-Emmerick Aubameyang, might have been able to settle a few of these ties early on.
NAIL IN THE COFFIN
If the Arsenal fans didn't think their title challenge was over already, they did now.
Joel Campbell opened the scoring and looked promising throughout the match. Only for the Costa Rican to be hauled off with half an hour to spare. This led to a chorus of boos at the Emirates and left many fans puzzled.
The tension in the crowd probably filtered down to the players and the Swans capitalised.
This meant the Gunners lost three successive games for the first time since 2010 and several Arsenal supporters are worried that they might not even make the top four.
The most infuriating part of this collapse for Arsenal supporters is that their team lived up to their reputation. Most of these games have almost felt like a repeat of past matches.
Not fighting hard enough in tough away matches, being complacent against weakened opposition and not having the lethal striker to kill off a tie early on. The same mistakes keep on being replicated and Arsenal fans won't want to see the same sort of displays next season.
Where do you think it went wrong for Arsenal? Have YOUR say in the comment box below!