I used the same courses from my top 18 as a reference. I gave the courses praise, now I take it away... kinda of. At a minimum, some are just my least favorite holes on that course.
1 Pacific Dunes (one of my favorites needs better opener - need to lower tee and make fairway wider - worst hole on course)
2 Country Club (PP) (boring par 5 with little interest - worst hole on course)
3 Wolf Creek (I usually like uphill par 3s like Dismal River #5, but this one is just stupid - horrible hole on any course)
4 Muirfield Village (feels like hole that was needed to connect the routing - just awkward hole)
5 Ballyneal (#5-6 are the least memorable holes on great course)
6 Calusa Pines (fine hole, but 2nd of a back to back doglegs right - so much so it is hard to differentiate them after playing)
7 Dunes Club (nice hole but probably least favorite on course)
8 Bandon Dunes (average hole - hit drive left and have open green with little interest - actually dislike #9 and #18 more though)
9 Old MacDonald (decent hole, but not a great Cape - worst hole on course)
10 Pinehurst #2 (long par 5 that lacks the interest of other holes - worst hole on course)
11 Oakmont (boring short par 4 that is too similar to 14 - hard time picking between #10, 11 and 14)
12 Sand Hills (had to pick one so it was either 9 or 12, which are the only average holes on the course)
13 Pete Dye (worst par 3 on course - just not much going on - and clearly done solely to connect 12 and 14)
14 Dismal River (would be good if it had fairway on top of left ridge so it played on top of ridge instead of down in it - green is good)
15 Oakland Hills (middle fairway bunker on a narrow hole to begin with - doesn't work IMHO - could have picked #6, #12 and #16 too)
16 Bandon Trails (great green, but pretty boring slog getting there - worst hole on course)
17 Brookside (long straight par 5 - worst hole on course, but could have picked #5 which is a good hole that does not fit the course)
18 Arcadia Bluffs (possibly the worst hole on a top 100 in the US - just terrible hole)