Yes.
Was in a strategy role at a startup that paid quite well. Working hours were quite intense, and I had the ache.
Had friends from a previous job and we left our jobs to work on the idea. Idea was to execute 0 to 1 and then raise seed funding, because we had decent savings to not raise a less than $2Mn round (pre seed)
Executed operationally for 9-10 months but it wasn't working.
Did not have a pivot in mind. The logical conclusion was get back to the grind.
Haven't gotten back to my old salary yet, it's like falling down a couple of stairs, but okay :)