Eh, it's an upleasant truth based on Rioter statements that denies people what they want while also flat out stating that one champion IS stronger than the other (i.e. Eve kills TF), CAN kill the other, and WOULD kill the other with said champ having no chance of escape. It probably leaves a bad taste in their mouth because, as stated above, some like the idea of TF being the "one that got away"...but he wouldn't, he'd just be another victim.
They're just making their displeasure known, as it is a fact stated by Rioter Reav3 here. You can't argue against it (he also says that Eve would 100% kill even the "Great Warriors" of the like of Darius and Garen). I'm guilty of the same thing now and then, too, as I'm sure we all are. It's all good.
That said, it was also stated that Tango Eve and Tango TF were still a thing, as it is an AU where Eve isn't a demon. So, again, i'd be all for some special interaction in that skin ^^