@teznaa yes it is bricked, steam updated the game to 64 bit and it no longer works with plutonium.
if you look on the MW3 Client Support page (the forum page you posted this in) and scroll down i think there is a downgrade post... but i KNOW there is one in the discord.
Edit: There are a few threads with stuff you can do.
https://forum.plutonium.pw/topic/46446/mw3-downgrade-and-update-prevention-guide/13
here is one of them but not sure if it is the best one as i have not used it.
