This is what I mean though, the players you're deciding aren't good enough are the ones who have obvious technical issues. The ones that my 8 year old nephew would be able to say 'he's rubbish' when watching a game. The players who are technically better you automatically assume the reason they don't perform well is because they don't try hard enough, because you're not taking into account that being a top class footballer isn't just about having a few good attributes and trying. You're really oversimplifying it to a massive extent.
Holgate for example struggles to make the right decision both on the ball and off it, that is a talent issue not an effort one. There's a post in his thread where somebody's highlighted the poor decision he makes leading to a goal, and unfortunately that isn't uncommon for him. Sometimes he will go 90 minutes without making a poor decision, sometimes he will make poor decisions which he gets away with, and sometimes he will make poor decisions which cause a problem. It's not that he isn't trying to make the right decision, it's that he doesn't know what the right decision is. Godfrey is one who basically relies on his physical attributes, he's not brilliant positionally and not the best at sensing danger but he is very quick and strong and can often use those attributes to great effect. Sometimes he can't though, and that's when he looks poor. Gomes looks good with time and space but struggles when pressed and when up against people who are stronger and faster than him. These are all limitations in the ability of the player.
I'm not saying they all have the perfect attitude and none of it is related to that, but it's much more down to talent. You don't have to be great or awful, many of our players are reasonably talented but also have fairly big weaknesses. Unfortunately we currently have some combinations - centre half and midfield in particular - where we're partnering people together who have the same weaknesses, and it causes a huge problem.