Took a break for just a few days and now I suck

I'm sure I'm not the only person this has happened to. I was solidly ~1350 ELO for a while and felt like I could still improve significantly, took a break for a few days to play another game, and now I'm on an epic losing streak and down well over 100 ELO with no sign of recovery.

Everything is bad. My decision making is bad. My macro is bad. My micro is really bad. My game sense is bad. My build orders crumble under the slightest pressure. I'm throwing games that should be over. I'm not having fun.

Can anyone who's gone through something like this provide any tips? Obviously I'm just too "in my head" about it, but it's been continuing over several days now and it feels like it's only getting worse. This isn't my first time playing a competitive RTS, but it's definitely my first time tanking this god-damn hard. I'm considering just quitting altogether.

The straw that broke the camels back for me, and precipitated this post, is that there was this one player I used to meet on the ladder fairly frequently that's really really toxic, just a complete asshole (blocked now, of course), and one of the things I used to tell myself to feel better about it was that his attitude is shit, there's no way he's going to improve, so I'll leave him behind. And that's exactly what happened! But I've fallen so far down now that I met him again, and even though I had an absolutely staggering lead (without exaggeration, I had triple his population at one point) I choked and he beat me. Fuck me.

Thanks!