Hmm...
Hard to think of any... σ(￣、￣〃)
I tend to dislike the new Servants whose got next to nothing to do with the previously existing TYPE-MOON characters during their first appearance but they'd eventually get too involved in the stories for them to be done without.
But in terms of trauma from the difficult battles in this game, the Servants I really dislike and would have felt a lot more stress free if had they not tormented me with their rubbish are:
U-Olga Marie
Nicola Tesla
Odysseus
...yup, it's mostly these three who'd turn up my nightmares... ｡ﾟ(｡ﾉωヽ｡)ﾟ｡
