If Hitler delayed war to 1942, he would have been in a better position at the beginning of the war against France and GB. France and GB's war doctrine is what lost the the war, and Hitler would have only had more armor, superior FW-190s and more pilots.
Hitler would have still developed the V2 and not the a-bomb and attacking Russian in 1943 would have proved disastrous, as Stalin's border fortifications would have been as well made as the Stalin line OTL and Stalin's army would have been much larger, especially without the Nazis practically doing everything right and killing millions of soldiers in 1941 as per OTL.
This all probably butterflies out US intervention, as the moment Hitler ran into a much more formidable Russian foe, he would have never declared war on the US. It is possible u-boat doctrine still would have left to US entry.
So, the war might end practically at the same time in 1945, though it will be the Russians taking most of Germany if the a-bombs don't fall first. WIthout US entry, it is likely Hitler would win, as soviet aircraft by 1944-45 facing the luftwaffe would have been way too inferior, and soviet tanks were vastly overrated. However, in such a timeline, it is hard to think of many countries like romania, hungary and finland allying with germany, though after france falls they might, especially depending upon how aggressive the soviets are in the east.