The last year of Trump's Presidency was dominated by the Pandemic, where he was in the perverse position of "leading the fight" to overcome its effect, while having essentially no power to affect public policy - which rested in the State Governors. (If you don't understand this point, send a letter to your HS and demand a rebate for your Civics class). Trump could open or close no schools, businesses, restaurants, day-care centers, or almost anything else. Only State Governors had that power.
Is it any wonder that whoever was President at the time would bear the brunt of the Public's anger, with the Leftist Media feeding it constantly?
(And of course, the first 2-1/2 years of his Presidency were dominated by totally-debunked "Russia collusion" hoax).
Getting back to the point of this thread, considering all Bachelor's Degrees as a single category is statistically the same as counting Killed and Injured as a single category; they are not. A substantial percentage of college degrees in this country are either totally lacking in academic rigor ("Education") or utterly worthless ("Ethnic Studies"), and are offered by colleges as a way of padding their student numbers with unqualified, uninterested young people whose main reason for going there is the avoidance of adult responsibilities. People with real college degrees (engineers, accountants, doctors, lawyers, business execs) are very supportive of Trump, but nobody carves out people with "real" college degrees, so the statistic does not exist.
It is analogous to another part of the spectrum where UNIONS support Harris, but UNION WORKERS (e.g., the Teamsters) support Trump by almost two to one.