How do you Rank up quick?

[Dimitrii]

not only that you have to play a lot but you need to win too.

losing give you shit exp.

This might not be completely true as you actually get rewarded with a 10% increase in xp for each consecutive loss you suffer. Idk what the cap is but that coupled with the fact that GC's that have a history of losing typically enjoy faster queues (as people bandwagon to the perceived "winning" GC) may actually make losing the faster way of ranking up via frontlines lol.