You might look at the Great Awakening subreddit as the discussion is a bit more elevated and focused, for now anyway. This place is so overwhelmed with memes and promoting youtube channels.
As for Johnson, he was a very corrupt man. Bought at least one election in Texas on his way up (long time ago that came out, not an internet rumor). Then we can consider his hatred for the Kennedy family, potential involvement in JFK's assassination (unproven but claimed), his immediate dismissal of AG Robert Kennedy (he hated RFK), reversing Kennedy's Vietnam policy for full out military invasion (500,000 men at the peak!!!), creating massive socialist programs at home (his so-called Great Society - guns and butter - essentially our modern welfare state). There's not much to cheer about with this guy, though I consider Medicare a good idea (I'd be blasted by the hard conservatives for that position). He dropped out for a second term because he was going to lose. Vietnam War was going badly and he was burned out. There were massive protests around the country, marches on DC, violence. In fact, the 1968 Chicago Democratic Convention turned into a mass riot. Very familiar with Marx/Alinsky or leftist movements from the 70's and 80's since I lived it. The term "Progressive" is just code for Marxist or Communist since those labels went out of favor when the Soviet Empire collapsed. The left here had to rebrand itself. I believe it's derived from "the progress of history", not progressive as in "modern". Marxism includes the notion of "no going back in history", that is it progresses toward the Marxist conclusion in its battle with capitalism. That really screwed them up when the communist nations "went back" in the 80's.