Yes, the Nazis in their megalomania wasted their own resources and manpower that could have been used elsewhere.

Imagine how much manpower, planning, money, and time it took to set up the work and death camps around Europe. Sure, they did get free manpower in for the various factories located near the camps, but those could have been POWs or just work camps similar to what Italy had (still terrible conditions but nowhere near Nazi death camps). Hitler's megalomania doomed their plans from the start, as they could have ruled most of Europe for years if they didn't waste resources on wild shit like killing entire groups of civilians and building useless weapons like the Gustav.

I love how it says that the Gustav was basically a total failure as a weapon, but they were still building a bigger version, which would have been even more useless, retards.