The cheating isn't even the problem. Sophie Turner quite obviously cheated on Joe Jones given how quickly she entered into a new relationship (few weeks), or at least that would be claimed if genders were reversed, and she arguably also committed legal abuse by filing a completely nonsensical filing about child abduction, but the focus is entirely on Joe Jonas smear campaign when his management was selling unfavorable stories about his ex and tried to control the narrative (if it was reversed people would have felt sorry for the woman for enduring these things, because it's believed immediately). This is a case where both are bad, but the priorities are set on what the unfavored gender (the man) did wrong. This is always the case. Heck, the narrative was unfavorable to Ioan even before Bianca despite him paying, seeing his kids etc. while Alice was a dick in public, all that just because he is a man.
I get there are many things in society were men enjoy unfair advantages, however when it comes to the narrative around divorce/seperation society seems to believe that we can do no wrong. A women leaving an abusive marriage is brave, a men is either a wimp or a abuser himself.