I cannot imagine Christopher Reeve Superman being upset about tweets, it's such a pathetic dumb thing to cause Superman to crash out and start screaming about, at most Reeve Superman would have been bemused by the whole thing.
This would be his reaction to a fucking tweet saying 'supershit';
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then he would move on and forget about it because he is an adult and not a terminally online james gunn-esque loser, but gunn had to turn superman into a thin-skinned whiny bitchmade cuck just like him.