I always thought of GWB as being the 4th worst, but I think you’re right in LBJ.
I rank Johnson there for close to 70,000 reasons. Also because of his Great Society programs. They are the bane of the U. S. to this day, and sadly beyond...
I think Bush ranks in there with other bumbling presidents, although the melt down under him certainly ranks him a special mention.
Johnson did severe damage to our military, in that we were reluctant to use it for several decades.
This goes beyond the interventionist nation building thing IMO. Everything since was labelled the next Vietnam. Gulf War I went a long way to alleviating that fear, although it didn’t quite materialize into something we would call a war.
It was more like a deployment and a skirmish. Others may disagree with me on that, and I’m not trying to trash anyone’s deployment and service here.
I respect those that participated in that effort.