Arsenal manager Arsene Wenger says his side lost out on the Premier League title “at home against the lower teams” having played some of those games “in a very difficult climate”.
The fourth-placed Gunners have won only six of their past 16 league matches.
Some fans have called for the Frenchman to leave in recent home games.
“We have to realise that away from home we are championship winners. At home, against the smaller teams, we dropped the points,” Wenger said.
Further protests are expected during Saturday’s game at the Emirates Stadium against Norwich (kick-off 17:30 BST).
Is Wenger right? Are the Gunners champions on the road?
Fans to protest
Fans’ groups Black Scarf Movement, RedAction and the Arsenal Supporters Trust want fans to raise placards reading: “Time for change. Arsenal is stale, fresh approach needed.”
Wenger, in charge of the club since 1996, said he can “understand the frustration” amongst supporters but called for them to “stick together and to support the team”, adding: “There is no success otherwise.”
Arsenal were top of the Premier League in mid-January but have since taken just two points from home matches against Chelsea, Southampton, Swansea and Crystal Palace.
They were also eliminated from the last-16 stage of the Champions League for the sixth successive season and were knocked out of the FA Cup at home to Watford.
“It is very frustrating because we were in a position for a long, long time where we could compete for the title,” Wenger added.
“We are disappointed but we have to fight. We have not to forget that in football you go down very quickly and you come up very slowly. We have to stick together.
“I can understand the frustration of our fans but despite that we want to support our team and the best chance you can give to a team is to be behind them.”