There were many other weapons which could have helped Germany win (or at least not lose) the war and most of theme were much less sophisticated than a stealth bomber.
Hitler's biggest problem was that he was obsessed with offensive weapons (the bigger, the better) and totally ignored defensive systems, such as guided surface to air missiles. It's quite difficult to develop and manufacture advanced weapons (or anything else) when your enemy is bombing your factories every night.
"would you have liked to live in a world where nazifascists/fanatics could decide your fate every second of the day where you were not allowed to speak even one word in public and be in constand fear that they come to your house putting you in a car and send you somewhere to work yourself to death or kill you if your job is done or just kill you outright on arival"
But that's exactly how it was in my homeland (Czechoslovakia) from 1948 to 1989, after we were "liberated" by the Red Army and Soviet commies.
In 1987 (only 26 years ago, the year I was born) my grandparents were interrogated by the secret police (StB, "State Security", equivalent of the German Gestapo) because an anticommunist slogan appeared on a fence next to their house. Two men in an unmarked car visited them at work and said "You're going with us".
I'm not saying that the nazi regime was good, but what replaced it was no better at its core (at least not in Czechoslovakia).