Same happened to me with EXO but see how it turned out, lol. Maybe if they were still in the picture, you would have come to like them.
f(x) was easily my 1.5 favorite group, but as other has said their story was too real and SM wasn't willing to showcase the full potential of the members who weren't Krystal. So, even if it hurts, it's better to see them doing their own stuff and celebrating f(x) and Sulli every anniversary date.
FX that debuted/lasted at a later time is just RV and yeah I like many RV songs.
With exo maybe if I had heard them in MAMA era I would have been turned off too. But good that they broke away from that 2nd gen sound and moved on to better things.
Songs from that era simply wasn’t good and FX was no different.