Buying all or mostly Bombers with the UK/US in the first few turns is a good way to lose the game.
While your trying to bomb Germany, they are running amuck in Africa and Japan is turning into a monster in Asia. The game is about capturing territory, which can’t be done by bombers. While you are busily bombing factories, a smart axis player will be gobbling every territory in Africa/Asia/Australia. The US can’t even bomb Germany with more than 1 Bomber until US 3. If you have no naval infrastructure or even any UK IC infrastructure early, you have no ability whatsoever to stop/delay Japan in Asia/Pacific and Germany needs only modest luck to take all of Africa. Plan for the Allies to lose to an 84 economic victory by J4/5 with no ground forces to take back critical areas in Africa/Asia. Game over. Try it sometime. Just shift your Axis strategy to an IPC victory strategy and not a military victory.