Come on man. This may sound harsh, but it's the honest truth. You didn't need to write this, all it really came down to is just either ignoring them or realizing that it really isn't a big deal. Almost everyone in this community has nicknames, people have gotten salty about them yes, but noone has gone as far as to quit the community because of it.
As far as your depression goes, the best thing to do is not tell the community about it (unless you are looking for some help, in which this shouldn't be the #1 place to go first) and take a break or do something that won't get you more upset and more angry.
Nobody and hPerks shouldn't have called you liquor, but as Regi said they didn't know you had such a bad week and despite what they called you, you were the one to get offended by it in the first place; so as much as it may seem they did all the harm, you did some to yourself as well by feeling offended by it instead of taking action (that isn't deleting your account) I have dealt with depression myself (from about December last year to a couple months ago) and I made the mistake of telling everyone the news and just making me feel worse and more hopeless.
I really don't think you should consider locking your account because of something as simple as this; you should really think long and hard about this idea before you regret it later.
Nonetheless, hope you feel better soon.
"cna you salt spalt the slevel salt of 6 year salt who ca salt the lsat" - nobody, 2017