What is there to discuss? Outside of the groundbreaking and way overdue Civil Rights Act, LBJ was one of the worst. He expanded our involvement in SE Asia and his "Great Society" schtick took FDR's work and kicked it into overdrive making him, in part, directly responsible for the fiscal problems this country is experiencing today.
I put just as much blame on Wilbur Mills. While he was lusting after an Argentine floozy and drinking himself to death, he was also using his role as Ways & Means chairman to boost his presidential hopes by "offering free shit" in the form of vastly expanded social security benefits, helping turn it from a retirement supplement into a huge social safety net.
This underscores that the best way to be remembered fondly as a President is to be shot in the head. His foreign policy was a disaster. One of the most grotesque comments ever made by a sitting US president: In April 1963 Kennedy assessed the situation in Vietnam: "We don't have a prayer of staying in Vietnam. Those people hate us. They are going to throw our asses out of there at any point. But I can't give up that territory to the communists and get the American people to re-elect me".[97] Oh, and he helped put the Baath party in power in Iraq. Yeay. The Presidency vs the steel industry was questionable at best and would have had the right here screaming for his head (as was the case in 1961, especially by the Wall Street Journal). Overall he was an average President at best, with some notable successes (Space Program, Civil Rights) and notable failures (large elements of his foreign policy, using the FBI to attack the steel industry). And people forget that for all his vision on the space program, the Soviets roundly and throroughly kicked our asses during his Presidency on that matter. The early space race was dominated by the USSR. His greatest foreign policy achievement, the Cuban Missile Crisis, was caused by his own actions and Kruschev's impression that Kennedy was someone he could bully, came perilously close to have a nuclear torpedo take out a US task force, and ultimately achieved a quid pro quo - the removal of missiles in Turkey for those in Cuba, and there's reasonable evidence that not all the missiles in Cuba were removed. Yeah, don't really want another Kennedy. I'd be happy with a Teddy Roosevelt, Eisenhower, or Reagan. Of course, even Reagan wouldn't be as far right as the current GOP.
