If I were to do-over, I would:

- Know that the world is MUCH bigger then even the largest city in the most populous country, and I get to pick where I'm going. So I'm going where the grass is green and bosses are not allowed to physically assault their employees, thank you very much.
- Do not care for missing or useless requirements, and only deliver the PoC. the requirements will all change the very second a client, BA or boss look at the PoC, anyway. Let them come.
- know that companies will replace you and do not need you, just as you do not need them. fuck their needs and live your own life. If they ask for overnight unpaid overtime, leave immediately and laugh all the way home.