Better to resign or get checkmated?

No, i don't think so @Akshaj_the_Chess_pro

Only if you leave or abort games does it count. If you resign, you end the game as forcefully as if you play until checkmate. In other words, you complete the game. So in my understanding it counts as a "completed game" for you.

In my perspective, resignation is the best choice due to the reason that I easily forget the pain

If you resign then yo have completed your game.

Typically I resign if I see I have no chance of making a comeback against an opponent. But, in terms of point loss, would letting them checkmate me be better? Basically, which outcome makes you lose less points?

Also, sometimes when a game ends in a draw, I lose points and my opponent gains points. How is who gains and who loses points in a draw determined?

If it is a draw, the player who was winning the game, loses points and you gain points if you were losing.

@AnshKr

No, you're wrong. I looked at my games, and the pattern was clear: The player with a lower rating got the points, no matter what. See for example this one:

As you can see, i was clearly winning and yet i got the points.

And this:

Now who was winning?

Hi , and if you are higher rating than ur opponent and if it is a draw u will lose points and your opponent will gain points

Thanks for clearing that up, i had no idea #18

And if u are lower rating than ur opponent and if it is a draw u will gain points and ur opponent will lose points