Getting only half the pot for a clear victory does seem bad.
I was using as a data point my own game: http://webdiplomacy.net/board.php?
gameID=11627According to messages I received, I got 8

for 6 SCs, and Austria for 23

for 19 SCs. I don't know about England, but I hope he got 11

for 8 SCs. It's a very small pot, so the rounding may obscure a lot of effects in this case.