Yes, this is "what I wish I knew before starting my first startup".

Which is an interesting topic, but very different from just "quitting my job and going back to interviewing", which is its own thing. I need a stable job (so no startups for me), but I've come to dread interviewing. It's not lack of experience (either job or interviewing), I'm experienced -- and my experience tells me they are dreadful.

I might be unfair, but "quitting to start my own startup" to me reads like the person doing this is: financially in a good place, in order to take the plunge (or alternatively: no family and responsibilities), and also very confindent that they can find another job if their startup doesn't pan out. This immediately puts them in the minority of engineers worldwide.

I hate the whole interviewing process so much, that I have sat on the one and only job I have had since I graduated university. It's been 8.5 years now, and still counting.

Do I want to leave now? Sure, but the amount of effort and motivation required is insurmountable. At least, for me. I've never been a type-A kind of person, and I sometimes envy those that are. I just wish "career trajectory" and fancy titles actually meant something to me, but I couldn't care less. I found no glory in this field, but rather ways to placate one's ego.