Yes - the German armaments industry was very quick to respond to emerging requirements, leading to a proliferation of platforms and versions that were logistically difficult to support, especially as the supply chains were disrupted. Some mass-produced weapons (e.g. the Panzerfaust) were widely distributed and well supported, but the higher-tech ones weren't.
I believe that they also had growing quality issues due to sabotage from slave labour and shortage of materials and alloys. I remember from Wages of Destruction and Albert Speer's memoirs that the loss of certain mines in the East were devastating to them because they could no longer produce certain alloys.
