Low fps afecting performance?

Since little i play FPS, i love rust, building and shooting what else can we ask for? thing is, i get around 20 fps, and i just cant kill people, i mean, i can barely see shots, or even see them fast enough…+i get really laggy, is it the lack of fps, or im just a noob?..

Well. I hav 30 fps and I just fine. But still, 20 fps is unplayable, what is ur specs of the PC? maybe we can help you.

laptop, i7 4700hq, gt745m 8gb ram, althought i think my graphics card is a bit dead