Persistent and widespread ActivationUI.exe error, 0xc000007b

This thread is no longer required. I won't delete it in case someone sees it and tries this fix for themselves.

I went into "Programs list" on my PC, and "repaired" literally all of the Microsoft Visual Studio Redistributables (left-click, modify, repair) and now the game works.

This 0xc00007b error seems to come because Battlefront2 and other Origin games were designed for 32bit systems despite nearly everyone running 64bit systems, and requiring files that cross between the two systems is bound to cause problems.

Good luck to you other problem-solvers out there, should you find this. I basically went through every Youtube tutorial I could find about this error to fix it, so if this does not help you, your path is long before you.