After update gaming is running bad..

Try a clean run of the game to eliminate software conflicts.

Close all programs in windows, check that programs in your taskbar to the right are also closed.

Open task manager and check not programs like geforce experience, nvidia shadowplay, msi afterburner etc.

Caution: do not close processes in task manager you do not recognise!

once you are happy that all the programs are closed run apex and see if there is no more stuttering.