After a short period of regaining your breathe and what purpose you had before you started then you will start to work on marketing yourself - GitHub profile/LinkedIn/meeting with a few recruiters...
You’re situation will probably remain the same until you jump. But you have to do the jumping, is my experience.
And honestly in our field (software) it just takes a few weeks to sign a new offer. Plenty of opportunities out there.
Depends a bit on the location though - but in certain EU countries it's not a good idea to have a gap in your employment, as it is used to calculate your holidays and retirement savings.
I have not heard of something like that. Sure the more month you have worked the more you paid into the retirement insurance, but a couple of months won't make a difference.
Not sure which employer would give you less holidays either.
Writing a resignation letter, even if you're not planning to hand it in immediately, might help you clear your head and make a better decision. Handing in your notice straigh after another fire/argument/nuissance, i.e. in a direct response to a single event, might turn out to be worse than doing it when things slow down a bit—purely because you'll have more control over the situation and will be able to approach it with less emotions.
> anytime I see it’s too much
Honestly, why wait?