I would like to suggest implementing an ingame table score
showing things like the wins , losses , win ratio etc of the players in the server you're in

But what im suggesting is an ingame score table that shows everyone scores
at once

Like you just press tab and kaboom! a table score shows everyone wins & losses

I feel like this would be quite a nice feature. Maybe not even a table as Led suggests, but rather just few additions to already current display, kinda like this:

maybe it shows up when you hover over the name

Pressing and holding a button to show the leaderboard would be the best option I reckon, as it is with most other games. It's non-intrusive and completely optional that way.

I think this would be an positive addition to the game, measuring how good you're doing in the server compared to everyone else.

Easier to add as a script, unlikely to be implemented as a part of game client.
All the data you may need for the table can be acquired by getting player info, so probably it's worth posting a request in Script board instead.