He is pretty decent with domestic stuff, and pretty bad with foreign stuff, which then ended up hurting him domestically. I'm guessing Wacky is watching the Ken Burns doc, which I hear is supposed to be really good. Hearing his interview on Sam Harris's podcast made me very intrigued. Vietnam was such a mess of black hole and we entered it's event horizon well before Johnson was prez, but he was also pretty stubborn over getting out.
IMO he is such an interesting mirror to Nixon, who was able to (while not nicely, but there was no nice by then) get us out of 'nam, and his China policy was a pretty good deal overall, but man, that domestic front, I don't need to explain that.