The Me-262 and Arado 234 were advanced, Germany lost the war before they understood what they had and how to deploy it!
Correct. Yes, the Germans had this technology, but it was rushed into service before it was ready and fully understood because the Germans needed something other than the way they had been fighting the war to that point. The tide turned in 1943; from then on, in hindsight, of course, the war was to end in defeat for the Nazis, despite the fight they had in them, despite their wonder weapons etc. The fielding of jets and rockets did nothing to change the outcome nor could they have done so if the war kept going, unlike wot people say might have happened on the internet. Because of its approach to the war and belief of how it could be won, underestimating its enemies etc, the Nazis were always gonna lose once the USA and USSR got into their stride. Their jets and rockets were aiming at the wrong cities and targets; German wonder weapons could never reach the USA's or the USSR's industrial heartlands.