Right mouse button plus direction is to accelerate running.
Right mouse button with space and arrow keys. It ran away.
It is normal to move slowly when using weapons.
I recommend you to stab with a cuff sword, one knife at a time.
After locking with F, the weapon becomes a sleeve thorn. When the soldier approaches, press the button on the left.
With the poison cuff sword, you don't need to lock up and get close to him. You can stab with your left sleeve sword without finding you.
If the overall game speed is slow and stuck, it may be that the graphics card is not working or not properly adjusted. You can continue Baidu search.