I'm absolutely sick of my current project. Our client/product owner continues to add (poorly designed) features that require complete back end restructuring and complex data migrations, despite my advice. After my coworker left last week, I'm the only developer willing to work on the model/api for our application. The rest are all frontend.

Everything I work on feels like such a heavy task. No mindless bugs to break it up, because I have no time. I have no one to talk to on my team anymore to help me solve those problems. I feel so alone and burnt out.

Any tips to better my situation here? :/

(Sorry -- this is is my first post here. It's an actually rant. And it's a depressing one at that)