Is this a non-ironic version of that "You are just mad because you are angry" meme?
If by angry you meant neurochemically brainfucked into bouts of being pissed off, maybe? Sometimes the cause of depression is pretty literally just 'cause you're wired that way and there's not really a damn thing you can do about it environment or behavior wise, for all that they can help mitigate potential consequences*. Medication can help, but I'm pretty sure you've been around for discussions on how much of a crap shoot that can be. Vital and helpful for many, but often enough inconsistent enough you maybe don't want things around that's going to make it easier for someone dealing with shit to kill someone, particularly themselves.
* Incidentally, I'm fairly sure roughly 100% of recommendations on that front (from anyone not sodding bugnuts or bankrolled by gun lobbyists or their ilk, anyway) include keeping guns well the hell away from anyone involved, at the absolute least if there's not immediate supervision.
Guess what happened? Suicide rates dropped. I'm not sure if that was the rate of attempted suicides or suicides that resulted in death, but the point is that reducing access to guns does reduce suicides.
Pretty sure it was both. Far as I can recall you pretty consistently see both a reduction in attempts and success rates vis a vis suicide when gun proliferation drops. Homicide, too.
Turns out there's currently not really a substitute good on the lethality or encouraging lethality front for firearms. For reasons somehow a mystery to many, the device we've spent centuries improving in regards to killing people makes it easier than just about anything else we got for people to die when it's around.