ME-262's had a pretty poor track record, more pilots died in accidents taking off and landing than in actual combat. The Gloster Meteor was more than a match, plus US/UK prop pilots developed SOP's to shoot M-262's down in ever increasing numbers. They simply loitered over known airfields and either wasted them on the ground or destroyed them when taking off, or in the final landing approach. Allied pilots also learned how to take their Mustangs in to a steep dive, using gravity to increase speed to the point where they could match that of the ME-262's. All this is talk is irrelevant though, the Germans were running out of pilots in 45, so the actual number of 262's built was meaningless, that is unless the Germans leapt three generations and developed a UCAV version!!!!
B29's were pressurised and flew at such high altitude non-pressurised fighters couldn't reach them. They would have been dropping A-Bombs over Germany unhindered if the war had dragged on.
The Bismark, though a great looking ship was a folly. Its career was pretty short lived, sailed on one mission, sunk a few Merchantmen. sunk the Hood and then was hounded and destroyed. Take the cost of building the ship, material used, number of hands lost and turn that combination into U-Boats instead and I bet you would have achieved a higher kill ratio against Allied shipping. In fact all the Pocket Battleships were follies, Bismarck, Graf Spee (sunk in 39) and Tirpitz (took part in one action, only time guns were fired), Lustow (severely wounded in 41) were all sank or confined to port by the RN/RAF, not one had a strategic influence on the wars outcome. In fact the German battleships in WWII performed less well than thier counterparts in WWI.
Whilst we lord German WWII military engineering, the war was won by quantity not quality. The German obsession with the latter meant they ended up facing huge odds on the Eastern and Western front. Too many prototypes in development, they produced more tank designs than the rest of all the combatents put together!