Poor connection but good ping from repeater

[lazerpanda1]

I just moved in with my grandparents and they have great internet (82mbps) but to extend the range they got a terrible repeater. I have tested the ping on my desktop over cmd and have average 10ms response. However; when i do a speed test I get 1mb down 1 mb up. On top of that i can only get 2 bars on the connection meter and have a spotty connection at best. Is there a way to fix this heres what i have to work with right now

1 spare router
$50
2x 10ft cat5
a desktop computer
a laptop


Also ( i get a consistent and strongish connection with my phone and tablet)

 

[RealBeast]

Repeaters are generally worthless.

How far is it from the router to your computer?

How old is the home, wondering about the quality of the wiring, as a pair of AV1200 powerline adapters would be much better than wireless for gaming due to the lower latency and better bandwidth. I see good pairs on sale around $50 periodically. The only other good option is to run an Ethernet cable from the router to you, although they may not want you drilling holes to get it there.