Season 1 - 9

Season 2 - 7

Season 3 - 5

Season 4 - 4

I thought season 1 was incredible but the show really should have ended there.

Season 2 was meh but was you could definitely sense the show had no idea what it was doing.

Then season 3 and 4 come along and jesus christ what on earth did this once great show become. The show turns from a teen drama about depression and suicide into a murder mystery? You can really tell where the source material ends.

Heartbreaking really since i love the first season so much

My recommendation if you wanna watch this show, is stop after season 1 (it ends quite nicely too)