your speed test is to your ISP, ping ingame is ping to the game server. which if i understand this correctly is basically all the pings of: you to your ISP, your ISP to the game server’s ISP, and the game server to its ISP. so your last test is 82ms just to get to your connection without going anywhere else. 400ms to game at that point would be understandable.
but an ingame ping of .4 means .4 seconds, which is 400ms. that is for certain. above 100ms there is enough delay to cause issues with high speed attacking registering at all, and opinions are 200ms+ doesn’t work for qs3 period.