Is OTHER wrong in the post ? POST : (Sorry if this is long, I just really need to get this off of my chest)

So, to give some context, I met this guy around 2014 in one of my favorite online games, and we've been close friends ever since. At first we've just had a normal "get together and play together" relationship, but somewhere around early 2015 he started coming to me to talk about his personal issues outside of the game.

He'd often talk about being abused by his family members, especially by his sister, how he often gets betrayed by his closest friends, how he only finds solace in eating, how tired he always feels, and other issues which I won't spend too much time dwelling into. Since he was a person I deeply cared about, so I tried giving him advice on what I think he should do, and I'd usually tell him that he should see a psychologist to get professional help, since there's only so much I (an internet friend) could do for him. He promised me he would do as I told him to do.

This went on for a long while. As I've said before, he started talking about these issues in 2015, and he would continue to come to me for advice until 2018, where this incident takes place.

So one day, I was just casually chatting with friends over Discord, and I suddenly noticed a notification for a group called "My last goodbye". I curiously opened it and I found my best friend had made a group to say goodbye to all his closest friends before he killed himself. Now, this initially shocked me. He's shown suicidal tendencies before, but he has never done something like this. I paused for a second, and then I started typing.  
I asked him if he ever took or at least considered any of the advice I've given him over the 3 years he'd asked me for. He said that he hasn't, and the only reason he promised me he would was because he didn't want to upset me. This infuriated me, as I felt that all of the time and effort I spent caring for him were a waste. Our entire friendship felt like it was based on a web of lies. I just couldn't forgive him for what he's done. I told him to fuck off and I left the group chat. 

Anyway, from what I've heard from another friend, he didn't die in the end, apparently the amount of Advil he took wasn't enough for him to die of an overdose (How coincidental). I blocked him on Discord and deleted all forms of communication I had with him, and called it a day.

This happened less than a year ago, but it recently resurfaced in my mind, and I started feeling guilty. I started to wonder if I was wrong to do what I did that day, and I needed advice from an unbiased third party, AKA reddit. So guys, AITA?