Crying about bad roads and partizns in woods, is not for triumphators of Europe
They must count, that their terror tactics on captured lands and "New Order" is like adding oil to the fire, and it wont stay without payback. They achieved the full hate of local people. When people understood, that this is not just war - that's a war for survive, you know, something united them even more.
Except that most of the Partisans weren't normal people, they were jews and ardent communists who would have fought either way. Many inhabitants of the USSR sympathised with the Germans, like those the Baltic states, Western Ukrainians, the Caucasus states.
Please, give the references about partisans. From what i know, partisans groups were created even before the war, but due to disorganise of first month of war they self-disbanded. Partisan groups didnt consist only from people you stated, they were in majority consisted from regular people, who foguht their way to get invaders kicked of the country.
And, yea, separatists, they werent majority, and even more when they saw what "New Order" will be, they took Soviet side.