[Rant] Ignored my suggestions, and we have a situation - [I WILL NOT PROMOTE]

so I have been working at this med device startup and the sole engineer for the past three years. I joined as a student and stayed. Last year I had the chance to leave this place for a better opportunity but stayed because without be the product would have to be licensed to some other firm. I as also promised a significant salary hike. 8 months later, here is the state :

1. No salary hike, as unable to raise enough funds (single founder, no one fits his qualification for a co-founder), and my opportunity has gone. I was rug pulled hard. My mistake should have thought with my head and not emotions.

2. All the product suggestions I had told him for approval were denied because they were not critical and expensive. (For example, I was searching for a motor supplier and found a few good ones that would cost us USD 10/piece. the founder tells me to get it below 5 USD/piece. I couldn't, with our specifications. He capped the budget so hard for the prototype that I had to go for Chinese modules for it to work.) though the prototype works and works pretty well for internal testing. Now he tells me we have to build a final device to be sent for third-party validation (medical environment) and I have 22 days to design, develop, document, and test a completely new prototype and ake three copies of it. And guess what, suddenly all my suggestions over the years have to be implemented. Maxon motors, Infineon controller, and al(that's like 300USD / piece)

3. Man I feel so choked right now. All the changes require documentation, his approval, and his ordering process(I remember a critical project PCB sitting in his cart for 1 month, while he blamed me for taking too long to write the firmware and mechanical design (I took 2 weeks).

4. I have been doing chemical experiments, characterisations and all kinds of BS because my prototype "works for now'. But this dude changed the funding milestones like wallpapers on his phone and now I have to make three new ones in 22 days. How the f am I supposed to do that, when getting PCBs takes a week and parts from the mouser get stuck in customs for 15 days? I have to design mechanical things too AND fooking test everything so that it becomes 100% reliable to be tested in hospitals!!!!! I am going to kill someone aren't I.

5. Hired no one, because "time is an investment and we should hire only qualified people, even if it means not hiring at all sometimes." Man......

6. f the documentation man. Like, he has an engineering background but he hasn't been with the prototype that much so I have to document everything like I am explaining to someone 5 years old. The questions in the comments are like "What is power cycling, please explain in-depth,...or, list issues exhaustively, I don't see the list complete. Only 100 issues listed, should be at least 150."

Should have left this place when I had the chance.

I'm sorry for the rant but if this is the state of every deep tech startup, I'd want to be 1000kms away from the nearest one. Apologies for the grammar mistakes, spelling and everything. Had to get this out.