However I find myself being disagreed with quite often, mostly for not advocating or cheering violence, "by any means possible" change, or revolutionary tactics. It would seem that I'm not viewed as authentically holding my view unless I advocate extreme, violent, or radical action to accomplish it.
Those seem like two different things to me.
Edit: TO COMMUNISTS, ANARCHISTS, OR ANYONE ELSE CALLING FOR THE OVERTHROW OF SOCIETY
THIS OBVIOUSLY ISN'T MEANT FOR YOU.
Leftists discourage individual acts as Adventurism. The core through-line of Leftist thought is Mass Action, with differences on how to structure this.
Both Anarchists and Marxists have ideas on how to have this happen, but they mostly boil down to advocacy for organizing and building Dual Power. You may wish to read The State and Revolution if you want to delve into a thorough theoretical text by a Marxist, but it may not make as much sense if you do not already have familiarity with Marxism in general.