Mansplaining is when someone explains something logically and concisely and a person is so triggered and lacks any sense of humility that instead of admitting they could learn something they try to place the sex-card and start needless drama.
If that was legit what mansplaining was used for I wouldnt really mind, even maybe support the term. But like you said its pretty just used anytime someone feels triggered at this point, which is always
but like everything the sentiment has been clowned.