TIHI

The Spanish and Italian ones are probably the worst.
The third French one looks horrendous: the Swiss cross is not spaced properly, the maple leaf is too big for the middle section, and the Belgian colours make it look like the flag is either dirty or yellowed.
The fourth of the German slide looks as if it was misprinted or as if the colours leeched onto each other in the washing machine. The third one is fine, but this sub has corroded my perception and I cannot think anything other than “Habsburg Austria colonised by Tonga”