I've had an absolutely awful first five weeks in a new job. It's been shambolic to be honest. The on-boarding process has been basically non existent, the team members I have met have openly been incredibly negative about the role and the management, I've just been left to it entirely and it's 100% not for me. Thankfully I've managed to line something else up quickly. I'm drafting my notice letter, do I keep it very simple and just state my last day or do I say that I've come to the conclusion the job isn't for me and give my reasons for that? Do I tell them how horrific this entire situation has been? Is that appropriate in a notice letter?