I'm mortally opposed to the interspecies relationships. I played the original game where aliens were only bad guys and it remains one of my favorite games of all time, so I have a bit of a stake in it. (And by original, I mean the mid-90s game. X-Com 2 was called Terror from the Deep. Now get off my lawn.)
Fair enough. My only exposure to XCOM has been through the 2008 game and onward. As for the snek waifu stuff, those largely came about as jokes related to the revealed design in the trailers being accidental furry bait: Firaxis is kind of milking the resulting fanservice at this point. It is described as disturbing in-setting by your resident autopsy specialist though.
During Prohibition, the cops caught a priest running bootleg hooch. As they opened up the trunk and found the bottles, they asked him what was in the bottles. "Water," he replies. "Water? This is moonshine." The priest raises his eyes to heaven. "Again, Lord?"