DCL has done very well out of Everton and if people want to call out bad performances, of which there have been many recently, then they're more than entitled to.
People such as yourself complain that DCL is being hung out to dry by dinosaur tactics but it's actually playing on his best attributes. Do you honestly think he's capable of playing intricate attacking football that other teams use? He's no threat to the opposition outside the box with his link up play, he can't shoot from further than 12 yards and has no ability to beat a man. Getting him to chase down lost causes and be a pain in the backside for opposition centre halves brings out the best in him when he can bother himself to get involved, which has been a rarity this season.