EA Software Bogging Down PC - CPU + Mem usage - Problematic

Probably worth giving it another go. If you carefully go through all the options in the app, and even your account page, there are quite a few background tasks that can be paused or turned off.

For example, block updates to anything during game play. There are more too. Run with absolute minimum amount of background tasks can help.

However, re: Anti-Cheat, I can't say anything specific about that, sorry. But it shouldn't use that crazy amount of resources. If it was normal no one would play that game.

It's possible it was a bad install, or some mystery bug/conflict with something else unrelated on your PC? I don't know but anti-cheat systems can be a real nuisance. It could even be something like your security software constantly scanning/checking it when it activates, or does a particular type of on line check? Might need to add an exclusion.

Also close browser or desktop email progs, run "dxdiag." Try scanning windows image, then files with: Dism /Online /Cleanup-Image /RestoreHealth (copy and paste that into cmd prompt or power shell. That one should come up clean. Then check all system files. Same cmd prompt or power shell, type: sfc/scannow (again copy and past that. All should be done as administrator mode.)

Those are just a few general checks. There are too many to mention. Thing is losing access to the game you paid for is really bad. Hence worth trying again and doing a bit of trouble shooting.

The issue you explained is really bad, which ironically may make trouble shooting easier. Regardless, don't give up just yet! Good luck!! 

EDIT: It is very unlikely that you are the first to experience this major issue. Hopefully someone who has the same game and expierenced then solved the same issue will see this thread and give an actually solution.