To put it bluntly, you are screwed where you're currently working. If they can't prioritize a decent machine for you to work on, then they really don't value y

To put it bluntly, you are screwed where you're currently working. If they can't prioritize a decent machine for you to work on, then they really don't value your work as a developer. (Most likely, they don't value any developer's work.) Things are very unlikely to get better there.