What oh what is wrong with these haters. They think because they have been here a while they are experts. Ridiculous. In fact it is exactly these haters the Thais frown upon. It's very clear that they have learned nothing at all living here. All they really did is bring their stinking attitude here. Pathetic sad and quite embarrassing. Disgraceful behavior.
You're going about it the right way. Ask the right questions. Not sure your business ideas have substance. We started in Thailand 12 years ago and it was a tough call. The first thing you will learn is that nothing good happens here without personal introductions to Thais within the field of your business. We had a lot of issues and in the end I just sold the Thai part of our business to Thai national as this was at the time our best option and I was out of it and so was the stress. Thailand is still a great country and with a unique business idea, and local contacts you can build something. Good luck 🤞
You are not a prize idiot. Trouble is if there's no agreement you have no leg to stand on. Police will not help here. Put it down to experience and move on.