imo you should be using the vandal up until at least gold/plat and maybe even all the way up to immo
it teaches you the right fundamentals that are the ethos of valorant, whereas with the phantom you can succeed (get kills) by crouch spraying
using the vandal makes two-tap strafes necessary to improve at gunplay and overall improves your movement, as well as the importance of your first bullet accuracy
tl;dr be an aspas, not a boaster