I see so you mean if you ping google with nothing running you do not get spikes but you do get spikes when there is traffic like game traffic running.
What I would try to do is take another device if you have it and try to let a ping run. The thing you are trying to determine is it limited to just the machine or is there something actually wrong with the internet connection.
If your internet is very small in particual your upload speed it is pretty easy to over utilize it and you will see these ping spikes. It is not common anymore, this was on DSL connections that have very low rates like 10mbps down .5 mbps up.