Are guys held to unreasonable standards in breakups?

I have only had one girlfriend and we just broke up recently and its frustrateing because I feel like if a girl breaks up with a guy we are supposed to be polite but when a guy breaks up with a girl they get all emotional and (some not all girls) tend to say mean things to you. My question is why is this and is this a societal norm developed over time or just something (some) girls do to make the guy feel bad for a couple days when in truth most men already feel like shit for doing so?

Are guys held to unreasonable standards in breakups?
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