Good points Rithika.
Anyway, there have been many shows where characters were introduced as part of triangle to the story. Some of them went on to to become leads (Milind, Kayamat), where as some turned negative (Prithvi, Kaisa Ye Pyaar Hai), some stayed positive (Rajat, Bade Acche) and moved on. Some like Tujh Sang Preet Lagayi Sajna or Kasauti just continued with u-turns
Balaji CVs do it every time they run out of ideas, let's have a triangle (or a pregnancy out of wedlock, or both!!). PR CVs seem to specialize in it - Arjun, Purvi, Teju, Sunny and they may well go for a triangle with Soham too.
Earlier, Arjun was the favorite whipping boy of CVs and Purvi their punching bag. Okay, it's not just limited to CVs 🤔