Why we don't become angels when we die

Logically any Catholic would say that angels are different than mankind, but some would say that as we die our souls become angels. That is false, angels are another creation by God that has the same intellect, mind, and free will, but spiritually they guide man on the right path. First of all Angels are not man with wings, but spirits that try to lead us away from sin. When we pass away our soul leaves our body and enters purgatory to be cleansed of our sins and to repent to God, so he can allow us in to his paradise. We are completely different from angels in every way. Angels don't have a physical body like us. to conclude Man and Angels are two different creatures created by God.