The cartridge only contains version 1.0. Without the update, you are playing a broken port. The textures look like Vaseline smeared on the screen, and loading times exceed 45 seconds.
When DOOM first launched on the Switch in late 2017, it was a marvel, but it wasn't perfect. It launched with several performance bottlenecks and bugs that were only resolved through subsequent software patches. If you are using the base NSP (v1.0.0), you are missing out on the optimized version of the game.
that specifically affected players using newer hardware in backward compatibility mode. Arcade Mode:
This article covers everything you need to know about the , from technical improvements to why the latest version is mandatory for modern play. The Evolution of DOOM on Switch: Why Updates Matter