Vanguard in it's current state can be highly frustrating to deal with.
From my personal experience, I've had Valorant tell me that a "System reboot is required." because Vanguard isn't running properly and at times the problem can still persist even after a restart. Having to restart my PC every time Vanguard has a problem is highly annoying and for the problem to still not be fixed is even worse.
Meanwhile some of my friends have a problem with Vanguard not properly running and causing their game to crash at random intervals, or even blue screening their PC.
All and all these things need to be looked into and fixed, because having to restart PCs just to play one game is frustrating and I would rather wait a day when I turn my PC off for the night than play a game of chance to see if Vanguard wants to work today.