I am a fierce opponent of traditional male gender roles and the whole "man up" expectation.
It's funny, for a man in many social circles, it's perfectly socially acceptable to say you've been in such a foul mood you wanted to murder someone. It's not socially acceptable to say you feel sad or someone hurt your feelings, and leads to that man being treated with contempt.
The suicide rate is largely linked with this expectation on men to be like Teflon. It's for the same reason that males who suffer from disorders such as clinical depression are often singled out for particular contempt and often bullying, both stigmatised and treated with a lack of empathy and compassion, as they are perceived as not conforming with the demands placed upon them from traditional gender roles. Contrary to what some stupid feminists seem to think, the male gender role can be extremely oppressive too, and often is, it's not always a picnic for men under the expectations of traditional gender roles.
I have seen some women online openly state their contempt for men who show tears and how unattractive such men are, using shaming behaviour to attack males who don't conform to her ideal. That kind of woman gets no respect from me.
Given that some people are extremely predatory and act rather like emotional vampires, it is nevertheless best to restrict showing emotion to environments where such is safe to do so.