Larrain is an excellent film maker and there is craft on display here for sure, visually, and with elements of the score (not the Reggaeton - it is almost worth watching to hear Bernal's rant against what is certainly the worst musical genre on earth), but this is a chore. No element of the story really grabs, the main character is obnoxious and irritating, and the rest are neither here nor there. Probably a 4.5 but I'll give the benefit as there are moments.
Hopefully his next will be a return to form. In the meantime I'll watch Jackie again.