Mate, I do agree that the gme is not silky smooth and my 1070TI is constantly on 100% to keep 50-60 FPS, but except that I have no issues, no crashes etc.
Well when it comes to troubleshooting there several ways to go.
First I would like to ask you to provide the following information -
Run - dxdiag click on See all information and upload the file. Without knowing the system it’s just shooting in the dark.
From your end you can -
Check your system resources - before running the game open Task manager and see how much of the resources are free, if there are apps that are utilizing a huge portion of your Memory or CPU, might be there is something eating up your resources.
Check if your drivers are up to date, including Windows updates (yes sometimes Windows updates can fuck you over, but what that happens the whole internet explodes and then you wait for a week or two)
If you are using a Laptop, check which Graphic Adapter is being utilized by the game.
Hardware stuff to check -
Check your System’s temperature if you have components overheating, well time for a new cooler.
Check the health of your storage - defragmentation is a good first step, you can also run the following -
chkdsk x: /f /r (X represents the targeted drive)
Hope this helps