2 things; this is certainly not a "disney-level" story, and if you view this as a "soap opera" then by that very definition it is going to have twists and turns, and mysterious intrigue, and characters holding deep, dark secrets, and relationship drama, family drama, inexplicable coincidences, outlandish plots, and emotional highs and lows.
DPC is not writing a straight-forward, cookie-cutter story, it's more of a mystery drama series like "Secrets and Lies" where, on the surface, BaDIK may seem like it's just a simple teen rom-com, but it isn't. Just think about the number of characters that were or are hiding secrets; Maya, Josy, Bella, Jill, Chad, Melanie, Sarah, Quinn, Riona, Camila, Burke, Tommy, Cathy, etc. There's mystery and intrigue everywhere in this story, and something that might seem coincidental likely isn't because it's all about building that intrigue by including hints and clues about how certain dots are connected.
This tattoo/symbol, for example, is simply too distinctive for it to not have some kind of significance not just because it's the same symbol, but it's also in the exact same spot. It means something, even if it's just as simple as being some sort of gang sign, it's still significant and not something DPC would include without a reason.
BaDIK is far from being a "simple story" with more depth, it's a deep story that presents itself as a simple story.