You need an upgrade.

That CPU was weak 6 years ago when it was first released and was only meant for browsing and playing videos. Now it would struggle playing youtube video properly (i.e. something beyond 1080p 30fps). It certainly can't handle a browser game like this properly. Well, it could when you are idle, but it's about half the horsepower of what's required for combat. (no, you don't need 2.6GHz, it's not quite linear... it's a bit complicated... thou you will want around 2.0GHz on a two thread CPU)

Sub $300 laptops aren't meant to be used for more than 3 years except light browsing so...

On the other hand a $300 PC (fyi, PC generally refers to desktop) can last 6 years. So if you are really tight on money....

Yeah, because every notebook is the same....

I think I said quite clearly that his CPU was on the weak end on the day it is released. The laptop I had 10 years ago(my first laptop) had a stronger chip in it. I remember it had around 2GHz. Intel Core 2 Duo from 11 years ago have units up to 2.66GHz(granted that's not a laptop chip, laptop chip is up to 2.16GHz)

Jib mentioned chromebook, the cheapest new chromebook I can find, an HP chromebook at 181, features a 2.16GHz chip (turbo up to 2.56GHz if thermal allows)

(You see how high end CPU from 11 year ago matches a low end one from today? So high end stuff can, in fact, compensate for age very well)

It's not just because it's old, it's because it's old and that it's a low end unit. Those things don't age well at all.

P.S. all above mentioned CPU are two core w/o hyper-threading, so they are fairly comparable. Thou they are from different lines so there are minute differences is actual performance, but not more than 10% worth.