But. I looked through my email, like you do, and realized that a story I'd essentially forgotten about had a personal rejection. Considering I've had like, four personal rejections, you'd think I would have remembered. But that's the thing with personal rejections; they are still a rejection.
In a way, a rejection is better when it's clearly a form. Cut and paste. Because otherwise there are so many questions. Like, what was the one thing that made this a no? Can't you tell me and give me a chance? (This is what the mythic "Revise and Resubmit" is with regards to novel querying; I don't think it tends to happen with short story markets)
Especially if after the rejection, you see oblique snark on Twitter which may or may not be about you. It probably isn't about you. But what if it is?
But a good thing to remember as a writer, at any stage: don't do it. Don't reply to the email, don't reply to the comments. That's not what you want to do, even when it's what you think you want to do. No good can come of it (that I know of, and that I've ever heard. Ever).
Just settle your biscuits and step away. Do not engage.
Just dust yourself off, make a notation of the rejection (in your spreadsheet, or on Submission Grinder, or both. Whatever.) Submit the story again. Reread. Make edits where needed. Rock that shit.
And one day. One day, there will be an acceptance. I must believe this.