I just don't think this is an accurate assessment at all.
I was largely done with him after his display at Brentford away last season (the 2-2 draw), but that was the last naff game I actually remember him having. He's not a long-term first-choice RB for us, but he's kept his head down, worked hard, and is now making valuable contributions at both ends of the pitch.
Last season he contributed 15 G/A in 47 appearances (great figures for a RB/CM hybrid), was largely our best performer during that rough Christmas period, and then he finished the season in decent form. I wanted us to sign a main RB in front of Nunes, but I was fine with us going into the new season with him as back-up.
He started this season a bit up and down. He was very unlucky against Brighton, with the handball for the penalty, and I remember the dismal reaction when he came on for Khusanov against Arsenal. But he was great against Arsenal and has taken his opportunity ever since, allowing Khusanov to recover without hurting the team.
Things really started picking up when he got us the lead against Burnley a few weeks ago and sent us on our way in that game, then the fans were chanting his name against Everton after another good performance, and two great performances against Bournemouth and now Liverpool have deservedly got everyone on his side again.
His good form also means Pep has stopped playing Lewis at RB, which we've all known for months now isn't his position. That was costing us big-time last season and I don't think it's a coincidence that our form has improved so much ever since Pep started playing Lewis as a CM instead - that's down to Nunes filling in, alongside O'Reilly.