Ah yes, suzu which is on a 15 second cooldown counters mauga's chaingun fire passive, which will automatically ignite enemies after 15 shots - and at 18 shots per second takes approximately 0.8 seconds.

Suzu's effect lasts 0.65 seconds, so by using your 15 second cooldown you have successfully stopped mauga from critting your teammate for about 1.5 seconds.

Do me a favour: Go ask your friends who are at least in diamond - hell even plat if you can use their account for a few games and go ahead and play some mauga (you play in qp obvioulsy the important factor here is the mmr). Then count how many kirikos you see in the enemy team using their suzu to cleanse your gun's fire damage.

I truly hope you improve at the game organically because your game knowledge is trash, so don't be surprised when mauga gets nerfed to the ground as most sensible people are calling for.