The average person has no idea what even transpired. News from Kamar Taj, Mount Wundagore or a different universe will hardly reach the ear of many others. The sorcerer's including Strange and Sorcerer Supreme Wong also fully know what was the cause of it. I mean Strange now carries his own personal mark for using the Darkhold and he only used it for like 10 minutes.
The events of MoM are actually not that relevant when it comes to public perception. Westview is still the far bigger problem.