How to become an excellent assassin in less than 5 minutes

I was just realizing why people are saying that assassins are underpowered right now, while all the bronze squishies are saying that they're op because they tried to 1v1 them.

This video is now more relevant than ever, and it explains at perfection what an assassin does, besides roaming around the map, killing bot lane over and over until they start crying in all chat, oneshotting the adc, and setting up plays with the jungler (or anybody else which is roaming) after having pushed their lane.