Honestly, the "*****e-looking" comments are completely out of nowhere and rather odd.
Hell, I don't even use that as a reason anymore as to why I dislike an actor 'cause it's just so random. Same thing with "weird-looking, creepy", etc.
If you wanna make an argument as to why an actor is wrong for the role, don't base it off of one's name or looks (completely, though they are a factor; just not a great one) -- watch what they've been in.
I mean, that's what I first did with O'Brien then I realized how foolish that was so I actually went into watching some of the stuff he's been in and that's where I came to the conclusion that I wouldn't wanna see him in the role because he's just very mediocre to me.
His character in Teen Wolf did absolutely nothing for me, The First Time was just a very bad TV film and I had a hard time believing him as Dave, especially compared to how he was a hipster in The Internship (another throwaway movie with two used-to-be-funny comedians), and The Maze Runner was another glorified YA film with the only actor I actually found to be tolerable (in that) being Sangster.
So, those are the
main reasons but other smaller reasons stem from on here, like the various pictures, gifs, etc. aka being "shoved down our throat", and his look
(which I find to be a bit smug for a character like Peter Parker).
He's not a terrible actor by any means, but I don't find him anything remotely special either.
I guess that's why I've been throwing out names like Lerman, Martella, Everett, Highmore, etc. (and being able to appreciate names like Issac, Asa, etc.). because I see a more likable approach and a sense of warmth that I want for Peter Parker as well as charm for Spider-Man (though Highmore would be a great Harry, too.).
It also helps that I just like them as actors, especially Highmore who has a
a lot of range which would help greatly in playing basically two characters (obviously just one) and he has a really good understanding of the character (or at least what I want from it):
http://www.cinemablend.com/new/Freddie-Highmore-Up-Spider-Man-Here-What-He-Said-70184.html
Anyway, I rambled enough.