I get this feeling that Germany could have won WWII if they weren't led in such an incompetent manner.

Would my suspicions be confirmed if the following happened?

1.) The Germans wiped out the British at Dunkirk.

2.) Fully mobilized their economy for war, and didn't decrease weapons production after the initial advances against the Russians.

3.) Deployed their U-Boats in the Mediterranean ASAP in order to screw over the British Navy while they had the chance.

4.) Standardized the production base more extensively.

5.) Used the Waterfall Surface to air missile against the Allied Bombers.

6.) Reinforced Rommel better in order to gain a route into the Middle East.

7.) Tried to take out as much Russian industry as possible before they could be moved to the Urals.

8.) Thrown the Americans/British off the beaches at D-Day.