If someone earned an absurd amount of Veritanium at the end of a match it’s because of a bug that occurs where the game registers you as level -1 for some reason & locks your classes before the match starts so you’re essentially forced to play whatever your default class is.
At the end of the game, the Veritanium count shows the total amount that the player actually has because the game thinks they levelled up from the match, and registers it as such at the end of the game, as it says it rewards the player with all the level unlocks they have already got.
Hence you may find that the game says you have 39 new things to look at in the Extras section after you finish & exit the match because it somehow thinks you unlocked all 39 O.W.L.F. Tapes again in the match you just played.
It’s a weird bug for sure. But hey, the game is full of them so it’s not like we aren’t used to them at this point.