Why is Pip dissatisfied with Mrs. Wopsle's school?

Basically Mrs. Wopsle's school was a gong show,

"The pupils ate apples and put straws down one another's backs, until Mr. Wopsle's great-aunt collected her energies, and made an indiscriminate totter at them with a birch-rod."

If that wasn't enough,

"Mr. Wopsle's great-aunt fell into a state of coma; arising either from sleep or a rheumatic paroxysm. The pupils then entered among themselves upon a competitive examination on the subject of Boots, with the view of ascertaining who could tread the hardest upon whose toes."

THere was very little to learn other than this school was a waste of time.