But ignoring the mass US effort? Without the bombing campaign, Tigers would still have been produced at 105 per month and Panthers at 505.
As Kiwirob stated, the RAF dropped more bombs, but even then, those Tigers and Panthers wouldn't have had enough fuel to run on and would be driven by inexperienced crews. They were short of high-grade materials, and were prone to shattering. The quality of those tanks is also somewhat overstated.
Without the US, Germany would have had the resources of most if Africa, Italy, and others.
The British had mostly rounded up that campaign by the time the US got involved.
Recall Russia was drafting 15 year olds and women with 1/3rd of the German army fighting the US and UK and most of the aircraft.
Not quite. It varied over time, but at the time of the invasion in 1941 it was 86% of the Wehrmacht and all of the SS. Through the conflict it varied from 75% to 80%.
You also handily glossed over the fact that they also kept the Italians, Romanians, Hungarians, Slovaks, Croats and Finns occupied over there, plus the elite of the German army was also sent east. The western front was manned by inexperienced forces often made up from reserves.
As for the Red Army drafting 15-year olds and women, I don't really get your point. Communism doesn't discriminate between men and women. The British still to the day accept recruits from the age of 16. The Red Army's use of child soldiers is way overstated, they were generally sent on secondary taskings in the far east to relieve units better suited for the frontline. In any case, it was nowhere near the extent to which the "fearsome" German military used children.
I never understood the often intense resentment the US generates in Europe. Would communism have been better?
Extreme wire-tapping that makes Stasi and KGB look like amateurs, lying about wars in the middle east, with us or against us threats, illegal abductions and inhumane CIA prisons, starting multiple wars in the middle east and sending waves of immigrants our way, ripping up deals with Iran, Victoria Nuland, war crimes in Iraq and Afghanistan, the current governments opposition to the EU, the previous US governments attempts to force US agricultural products onto our shelves, the list goes on and on. Did you honestly expect anybody to like you after all of that? Then you have all the internal aspects of your society that disgust most Europeans, like your 3rd world healthcare system, allowing faulty designs to fly or school shootings. Those net you about the same credit as Zimbabwe did for killing white farmers, or Ethiopia for its famines.
It is not what you did then, it is what you do now. You don't get a "bad behavior credit" for doing good things in the past. Doing bad things now instantly wipes out any goodwill you had previously.