Just exit Steam.
Get rid of the anti-virus cause they are basically all bloatware trash anyways. If you need a good scanner juat to check stuff us ESET Free Online Scanner and MalwareBytes

Once you ensure junk isn't running right click Steam > Run As Admin

Once it's running go to Downloads at bottom of the client. If anything has started, pause it. Now this particular game, right click it and go to Properties > Installed Files and click Verify. Wait til it's all done. Don't even do other stuff on the PC while it does this. Unless maybe you have a movie file to watch or something but avoid installing anything or running any other demanding apps or even doing YouTube while Steam is downloading. If you must do that then go into Steam Downloads and click settings in upper right and set a download limit. Otherwise Steam will try to use the max bandwidth like you would otherwise want it to do.

If a Steam downloading process appears to hang, just let it finish. It's most likely dealing with files on local disk drive before the download can continue.

If still have download issues try a different atwam download server in the Steam settings

still it hangs, and how do i find the atwam download server? can't find in steam settings as you said

and i use malwarebytes

found it but i am still having problems

then just let it finish

look at steams downloads page and if the disk line is high, then its using your drive, and just decompressing and copying data that was downloaded
once its done its done

you can disable and/or pause any av
and be sure to set it to ignore steams install location and any library folders so ti will not scan them while steam is downloading/updating games

i had left it for a full day, and still it was stuck at 331.4

Then exit Steam Client fully.

Navigate to your Steam folder... easy way is right click Steam shortcut and click Open File Location.

Then go to Steamapps folder. Delete the Downloading and Temp folders + contents of those.

If you have multiple Drive Libraries for Steam.... such as on secondary drive(s) then also go to each of those and do the same

Now launch Steam and go to game name > properties > Installed files > verify > wait until done.

i already did that, now i reinstalled steam and i hope it works

why? i did everything, even the things you said and thank you but still, it hangs, ♥♥♥♥, why me? even when i reinstalled steam fully, it ♥♥♥♥♥♥♥ still hangs, in safe mode i did things too, changed region to download, nothing helped

game pick