Alec Trevelyn Is A Great Villian
Rare for a Bond film to have a main villain be a former friend and really a villain better than Bond, in terms of toughness a lot of villains have henchman like Oddjob and Jaws who are superior but Treveleyn is the main villain of GoldenEye (1995) and is one of the best.
His motives are different, he doesn't want money or gain really, he wants revenge for what British betrayal of Lienz Cossacks during World War 2, as his parents were and ended up commuting suicide.
Sean Bean is very good but it is unbelievable his character would have been alive during world war 2, Bean was 36 when he did the film, even if added the time between Trevelyn's faked death and his reappearance years later he would only be about 45, maybe an older actor would have made it more believable.
Then again, it would have been unlikely to be beat Bond if an older actor was cast.
All in all, I think Bean was great and a great character.