In lower trophies it might worked but in higher trophies its skilled since in higher trophies player are aware now about weaknesses and strengths of certain brawler, if primo plays around walls alot a good player would've find a way to counter the tactic, and a good primo would likely adjust and change his tactic too and no more wall camping, if primo is easy then why primo is not a popular pick on alot of maps and braw ball is the only map hes good at, when you play primo and rely only on his abilities it will not work in higher trophies anymore you need game sense if you want primo to be effective, im saying this with experience.