Psych Thriller with biggest mind-blowing mindf*ck

I typically read non-fiction and sci-fi but like to keep my brain on its toes (err…neurons?) with the occasional mental gymnastics.
My apologies for not having much to work with for guidance:

I really enjoyed Gillian Flynn's Sharp Objects and Dark Places (they were my first mindfcks). Others I rated highly were *The Woman in the Window, Before I Go To Sleep, and The Wife Between Us. The last two AI recommended to me, First Lie Wins and Behind Closed Doors did not do it for me. Too slow and couldn't keep my attention – I couldn't even finish.