Ok, it's British time.
(dis)Honourable mention: Churchill (Greece, Hong Kong, Force Z... )
1. Dan Pienaar (living argument in favour of having commissars #1)
2. Gordon Bennett (living argument in favour of having commissars #2)
3. Arthur Percival (not a coward, but that's literally the only thing to be said in his favour)
4. Bernard Freyberg (had tunnel vision, and that tunnel wasn't even pointed in a potentially useful direction)
5. Tom Phillips (walked into an obvious trap)
6. Richard Peirse (not very good at terror bombing Germany, later neglected his duties out of a preference for cucking poor Auchinleck)
7. Jackie Smyth (blowing up a bridge to prevent the enemy from using it, before having retreated across it yourself, has to be one of the biggest bruh moments in history)
8. Louis Mountbatten (imagine Churchill, if he had a field command)
9. Andrew McNaughton (wrote a book: "how to ruin an army in peace time, demoralize it during wartime, and scheme to cripple it after being relieved from duty". THANK GOD HE NEVER SAW BATTLE) [on that note, that's all the Dominions covered]
10. Archibald Wavell (more of a really mixed bag than anything. On one hand: Torch, Syria, relieving the Bengal Famine. On the other: getting kicked around like a soccer ball by Rommel, losing Burma, taking a long walk down a short pier.)