How not being able to undo a placement during building Temple Phase made me quit the league

I mistakenly put a generator room that made a full loop, upon closing the temple this was the result, all spymaster rooms deleted, lot of unconnected paths left over that I cant save either...

One misclick when getting frustrated with not getting the needed rooms rerolled and hours upon hours it took me to painstakenly build up the temple and it is all gone.

So sad I was close to hitting 99 and would have gone for 100, I was still enjoying the league.