How about I-476's northern end? Probably a combination of both...a bridge soaring 150' over Clarks Summit below, followed by a hairpin turn, followed by a toll plaza, followed by a tight trumpet that leads to another tight trumpet regardless of which ramp you take.
How about the left hand onramp from the end of I-66 dumping into the fast lane of southbound I-81 near Strasburg, Virginia? Would this be exciting or embarrassing?
Similarly, I-78 dumping into I-81 from the left at its western end. (Though unlike I-66, I think more traffic is coming off I-78 here than coming down I-81 from the north.)
As far as most embarrassing (not necessarily the LEAST exciting), I would have to nominate I-70: Little fanfare on WB I-70 approaching I-15 and the original east end permanently ending at a u-ey in a Park N Ride in Baltimore.
Reminder that I-70 doesn't go to Baltimore, and that the park & ride doesn't count
Just to split a few more hairs: I think AASHTO had approved officially truncating I-70 to I-695 in anticipation of the Baltimore Red Line project that later wound up cancelled. So if you count the 4-level symmetrical stack as the terminus, that's at least a bit more exciting than embarrassing