Alternatively, without the immense pressure of fans who wont accept anything less than a win in every game, a player like Lingard is more free to play his game.
Go to a West Ham forum and read their match thread for yesterdays game and see the difference between that and anything you'd read on here. They were 3-0 up and didnt get a win, and their fans largely are ok with the result, some citing their injury problems, others accepting the fact that on the day the opposition was better than them. Of course they are disappointed with the manner of the result to lose a 3 goal lead, but arent necessarily disappointed with the result itself.
Now compare that to what this place would have been like if we were to throw away a 3-0 lead. Within minutes of the final whistle we'd have multiple new threads saying how our players arent good enough, are complete bottlers, the manager is shit, and bumping of every other negative thread.
Its not hard to see why players might struggle to enjoy playing for our club when we have one of the most toxic, self entitled fanbases in the world.