I think the only character that annoys me in the OT is Salacius B. Crumb. It’s just a completely unnecessary character.
I’m not going by these thread rules, IMO Jar Jar and Anakin are the most annoying in the PT. In the ST most characters are, LOL. Rose must be at the top but not far behind are Finn, Hux, Holdo… Who else were there… Every creature on Luke’s island. Poe and Rey have many moments as well. Ugh, I really don’t like those movies when I’m thinking about them.
Edit: and I can’t leave Solo out, that droid must be the most annoying character ever in SW. In R1… I don’t think anyone annoyed me as a character, more how the film was pieced together and what scenes were left in etc. The film is a bit dull to even annoy. Well, I guess you could say that CGI Tarkin and Leia annoyed me a bit because they looked fake.