You may note that I used disapproval ratings to express dislike of Trump. While it is certainly true that disapproval is a mirror of approval, to me, a lack of approval also conveys people who are simply neutral or ambivalent, while disapproval is quite clear.
You may also note I used the plural form, "ratings", over the singular form. The goal of that post was to express that Trump was indeed an unpopular president. As such, my intention was to examine disapproval over entire presidencies rather than just the maxima, which of course may be indicative of overall performance, but not necessarily so.
You will note this by way in that while you have demonstrated presidents who have at some point attained a lower approval rating over Trump, you haven't demonstrated that they are actually less popular. Which is of course the entire point.