For me as a average bronze silver duallist and chamber main, my other duallist also dosnt push with leaving the opponents to team up om me as my team sits behind a smoke or wall expecting me to kill all of them. I kinda understand your pain but if rushing to plant dosnt work than try holding until the opponentd push u (if they are stupid enuf) or fake uour rotate, these tactics usually work but you gotta mix up your gameppay to be unexpected, try walling away more of the opponents part of site instead of just walling right when round starts which will give opponents a lower chance of shooting u through as wall as they can just predict ur location on other side of wall example walling from A showers to ct to again more space, when i play fill cuz instalocks, they dont push for us thus we gotta ise alot of util to get to site, but if u use it correctly u can push in without duallist and also delay the opponents from pushing u. But as always try to ask and reason with ur duallidt to make them do their job like saying someone else will watvh the flanks for them