What role would be criticized no matter who played it? From the captain in TNG to the lead Vulcan in ENT actors are getting criticized. Sometimes I think most of the criticizm given is better directed toward the writers or makeup artists than the actor in the role.
My choice, T'Pol of Enterprise. She has been criticized for her round eyebrows, showing emotion, taking drugs, loving someone other than the captain, being too stoic, not being stoic enough, etc... One person claims Jolene Blalock was hired only for her good looks and the next person calls her ugly. Most of all, she continually gets compared to how Nemoy would have handled the part. I think T'Pol is my vote for most impossible role to play satisfactory to ST fandom.
My choice, T'Pol of Enterprise. She has been criticized for her round eyebrows, showing emotion, taking drugs, loving someone other than the captain, being too stoic, not being stoic enough, etc... One person claims Jolene Blalock was hired only for her good looks and the next person calls her ugly. Most of all, she continually gets compared to how Nemoy would have handled the part. I think T'Pol is my vote for most impossible role to play satisfactory to ST fandom.