There were a number of peace overtures made to the West by senior German military officers. From what I’ve read these all involved surrendering to the West but not to the Soviet Union. All were turned down by FDR who insisted on unconditional surrender. This did have the effect of lengthening the war in Europe.
Not enough jets. Not enough pilots to fly them. Not enough time to train new pilots. Not enough fuel to train the pilots or fly the jets they had.