"3. Wired "
And your "ping" increases when other people are using 'whatever'?
How have you determined this, and to what 'server' (a game server?) are you connecting to?
The much misunderstood 'ping' value is the time it takes for a round trip signal from your PC to whatever server and back.
You do not have a lot of control over that value.
And you can investigate the magical 'ping' number for each hop in the chain.
But the only one you can have any control over is between you and the router. And
maybe the actual router if it is a crappy one.
Commandline, and run a couple of commands:
ping to your router. Generally, that would be
ping 192.168.1.1 (change for your personal router IP address.
This should result in
<1ms.
Next, tracert (shorthand for trace route)
tracert
www.google.com
or
tracert
www.whateveryourgameserveripaddressis.com
Do this when you are the only one connected, and when your family members are also doing their netflix thing.
Record the results.
The first hop in there should still be
<1ms.
The second hop is to your ISP.
After that, it is completely out of your control.