The point-of-view will not be unfamiliar to readers here. Critical thinking is not being taught to college students. Rob Jenkins has a bit different take on it that I found interesting. They are being taught something else under the title Critical Thinking instead.
I was not surprised to read the research he references that students do not improve much in many areas by going to college, critical thinking being among the worst. Yet I haven't attributed that to the colleges, as most critics would. I think many people just can't learn it, because they won't learn it, or it takes to much expensive energy to learn it, or they just aren't wired that way. I know plenty of fairly bright people who have the ability to apply critical thinking only in select circumstances, missing the obvious in other areas. Why do they hem and haw and hide and stop? I do not know. Go ask your Pop.
There may be something to the idea that colleges contribute to the problem by teaching something else instead, however. Such things put the mind to sleep. We can't learn everything, and will focus where need or interest directs. I think the first step is to set up the objective and dispassionate as an ideal, even while recognising all will fall short. The student might then engage in true life-long learning, reminding himself of the need.