The Cow-Rules at tus are mainly really very bad and unfair. If you cow, the best thing would be to punish urself with a simular -hp as u did to ur opponent (like in bng).
The rule is not even to skip at all. You are still allowed to get the crate, you are just not allowed to attack then. To skip 1 attack doesn't help enough in my opinion, especially if u did hurt 2 worms with about -150 hp!
I would complain about a whole game if the opponent wins because of cowing. Actually it doesn't matter if he kills ur worm or if he just hurts ur worms so much with cow, that he gets a very big advantage because of cow, where only 1 skipped attack as punishment doesn't really fit good to it.