The 30-year-old midfielder saw his club finish 15th in the Premier League and lose the Europa League final to Tottenham Hotspur last season and he thinks there needs to be a shift in "culture".
He said: "Every small thing matters. At this football club you cannot do anything wrong on or off the pitch because it is too big worldwide and you get punished by that.
"You get the attention of the media, the attention from the fans and you have to be aware of that.
"The culture of this club was winning. We need to bring that back.
"It's not only the winning mentality that we need but it is other things too that the club are trying to improve like the facilities, the team, the staff and a lot of other things.
"A lot of people have suffered from this and now it is time for us players to show it on the pitch."
While the club have signed Bryan Mbeumo and Matheus Cunha over the summer, the club captain thinks they still need more reinforcements.
He said: "It's improving. But it's not the place it needs to be.
"I don't want to take a dig at anyone but the club is doing the best they can in terms of the financial situation they talk about.
"But it was crystal clear we needed more competition for the players that were here, more quality to get everyone to step up a little more to get to the XI, and I think that is what the club are trying to do.
"Hopefully we can get one or two players more to help with that."