get someone wrong
• misunderstand someone, especially by falsely ascribing malice to them.
• "now, don't get me wrong, my fellow players are a great bunch of people"
Similar:
misunderstand,
misinterpret,
misapprehend,
misconstrue,
misconceive,
mistake,
misread,
take amiss,
get the wrong idea,
receive a false impression,
be under a delusion,
be at cross purposes,
be barking up the wrong tree,
get the wrong end of the stick,