Make your adhkar instead after the salah and do not participate in the congregational duaa. I personally would leave immediately after prayer.

In Canada, the mosque i go to that is close and convenient (as there is no other mosque nearby), is of a hanafi madhab and after salah they raise their hands for dua. I know this is not from the sunnah. So should i sit idle without raising hands or should i follow the imam and raise hands and make dua?