Dekha jaaye toh it is not only Vansh ... but all three characters are confusing 
be it Vansh ... Riddhima ... or Kabir
Vansh for obvious reason as you mentioned
Kabir ... though he is shown as a Cop ... all his activities are not-so-Cop types

samaj nahi aata bande ko chahiye kya
Khud ko kehta Cop hai ... technology itna advanced hai ... lekin 2 saal se usske paas koi proof nahi hai
And for me most confusing is Riddhima Madam

I still wonder is she the same girl i saw in first episode
Riddhima was a girl who explained it to Sejal ... "koi toh majboori hogi" ... of her (never met) parents to leave (9 days old) her on Orphanage stairs
And we have seen her giving bashan on love, commitments and what not to Vansh
The same person is doing pick pocketing, picking locks and attacking people (Angre)
Hurting Angre ... that scene ... i don't think can be taken lightly ... he could have died you never know 
i know show hai issliye aisa kuch nahi hua ...
but still Pyaar/Farz ke naam pe what and all is she doing
🥱
Riddhima have been spending so much time with Vansh by now
She knows he loves his family
she saw it by herself ...though his biological Mother left him for unknown reason, he still loves her
not even for once (nano-second keliye hi sahi) haven't she felt, Vansh can't kill a person, let alone his ex-fiancee
and if i am not wrong Vansh have told her n number of times he haven't killed Ragini
Anyways, waiting for the show to unfold all of its characters.