I don't understand...

[Foo01]

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Willingly choosing to ignore or not listen to advice to improve to help the group as a whole, is deliberately "screwing" things up. Period. They choose not to try and improve, or they choose to ignore the advice and such. The reason doesn't actually matter. If they are pulling the party down, after advice is given, they are doing it willingly.
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Trolls are different problem. The new player is not a troll. The unexperienced player is not troll. Player that are non-communicative and unable to do the role, vote kick it here for a reason. There is no need be calling players "BAD" for being more laid back and not playing up elitist standards. Somehow the elitist lump everyone else of the other 99% together can call them bad just so they can think that they are special snowflakes or something.

The new player that doesn't know what to do, isn't going insist on doing anything in any particular way. As long as you are not insulting them or rushing them, they will gladly learn to work with the team. If your troll detector is broken, and can't separate the two, then the problems you have are with the trolls. Trolls will insist on doing their shitck just to get a rise out you and they will pretend to be noobs to confuse you. Since there is no open world PvP this is the closest to griefing they can do and they enjoy doing it. Just kick the trolls out.