A lot of statements here just jumping the gun. Start ups are v good experience if these start ups are unicorns or unicorn type of potential. Usually these wont be your singaporean start ups (most of these are poor and sme kind) but those from other countries.

Unicorn startups easily > f500 companies imo. It varies but if the f500 company is not tech driven, it can be career suicide. I worked in both before, quit the f500 company in a month