yea its not just microstutters in fortnite its straight up lagging really hard for meFortnite compiles shaders while you play so after every driver change you'll get micro stutter till the game fully compiles shaders.
Afaik it still works this way but haven't played the game in a long time. The DX11 version use to run substantially smoother as well.
Elden Ring also can have traversal and shader compilation stutter so I wouldn’t test with it either.
i ran Latencymon again now i got this after 30 mins