Merson believes that the France international drifts in and out of games, and has suggested that he could suffer from second-season syndrome.
The former England international attacker has also suggested that opposition teams will work Payet out next season.
“Some people had Payet in the running for player of year,” Merson wrote in The Daily Star. “But while he’s a great player, he’s not in the running for me. He’s too much of a luxury player and I don’t think he stays in games enough.
“He drifts in and out too much for me. Payer’s had a great first season for West Ham, but they didn’t win anything and teams know all about him now. He’ll have to make sure he doesn’t suffer from second-season syndrome.”
Payet joined West Ham from Ligue 1 outfit Marseille in the summer of 2015 and has taken the Premier League by storm.
The 29-year-old attacking midfielder has scored nine goals and created 116 chances in 30 league appearances.
The Frenchman has a pass accuracy of 81% and a shot accuracy of 55%, and has won two headers, 67 dribbles and 16 tackles.
If Payet had not suffered an injury in the middle of the season, then he could have added more goals to his tally and could have created more chances.
While Merson does have a valid point about teams working him out and making it tougher for him next season, perhaps the Frenchman will adapt his game as well and get over those hurdles.