COD MW reinstalling itself after I bought it, but played Warzone

So the previous thread got locked down (Call of Duty Modern Warfare - Unexpectedly Large Patch (March 27, 2020) - #626 by Frank-24232)

We are closing to a week since the client decided to mess the game files and the only official response is to redownload the game for the 5th time because this time will be the last?
what happened to all the previous times the client updated itself and messed my game files?
New patch on wednesday but no patch for a fix?

If it wasn’t more than 3 months i had purchased the game, i would have already opened a paypal refund ticket
I simply cannot have access to a game i purchased because of the always online system.