gaming ping and latency problems

I am constantly having ping and latency problems (mostly latency). My internet connection is wired and I receive higher speeds than what I pay for (my plan is 500gb down and 10 up). I used to do a lot of online gaming but unfortunately every game I play online my connection goes to shreds. I have called numerous technicians over the years but still have the same issues. I run regular speeds tests and everything looks better than ever, but when I play any online games it does not translate. I this point I have accepted my fate that no matter what I do, I will always lag. 

Is there any way to fix this issue? I first thought it was my PC because of its age, but I recently built my first PC and still continue with this issue. I am also wired to my router and nothing seems to change. 

I also downloaded the new application Elite Gamer from Cox and still, nothing changes. I also feel that specs from the Elite Gamer comparison are inflated. The ping and latency boost they're improving doesn't seem to be true.