The Mane is hostile lately, but I guess we've never been the kindest board. I blame Bob...
Anyway, It sounds like it is a combination of many things, and one of those things is that it sounds like they're pushing (trying too hard, fighting the ball, whatever you want to call it.) If you are trying too hard to do something, or even too focused on not making a mistake, you'll paly tight and have difficutly executing. They need to calm down and just play football. If they start having fun, maybe things will move a bit better.