In posts on this site, you'll frequently spot the metaphor, Like kicking the ball against a wall in training.
It's a criticism of the bland aesthetic of the ball hitting the back of a modern box goalnet sprung like trampoline, and bouncing straight back out again.
Going forward it'd be useful for you to have a visual of this metaphor.
Below is Liverpool's Jimmy Case in the 1970's...
Kicking the ball against a wall in training