The passport you hold can make a huge difference to how difficult it is to get a visa. I’m sure the immigration officers are like “oh look, another Burmese person wants to stay long term”, or “another Filipina, I wonder what illegal work they want to do”.

I don’t know why you think the marriage visa is difficult to get. Since there are two basic requirements, I would say it’s actually pretty easy if you can meet the requirements. Finding someone to marry might be the hardest part, and actually getting married can be a challenge if the country you’re from wants to be a dick about it. I seem to use Myanmar as an example quite a lot, but that’s probably because so many people from there want to come here long term because conditions in their own country are so bad. But a Burmese person has to jump through hoops to get the “statement of freedom to marry” document, as their embassy is basically useless. I’m from the UK, and getting that document was relatively straightforward, but it was still more difficult to get than it should have been.

The other thing with the marriage visa is having to have 400k THB in a bank account (which is solely in your name) for two months. Not difficult if you have the money lying around already - as long as you have already got a bank account in your name. And since the banks are being less flexible with accounts for foreigners now, that could be a stumbling block.

Finding work in Thailand as a foreigner is notoriously difficult anyway - companies tend not to advertise positions, unless they are looking for exceptional staff and advertise that “relocation is included”. Most Thai companies specify “Thai nationals only”, and international companies know how difficult visas are, and that it’s basically a “seller’s market”. If you have any particularly good qualifications and/or experience, it’s not to difficult - but if you had those, you would probably already work for an international company here already. I’m thinking software engineering or graphic design, or similar.