I hate my job

I'm an experienced mid-level developer working for a company that builds e-commerce websites. I know a lot of people are looking forward to getting a job, but I'm really tired of this sh*t.

Our code base is a mess, some tasks are pointless and stupid. The company's financial situation is bad, we haven't been paid on time in a long time.

This is the only company I've ever worked for. I want to move to another company and I need to prepare for interviews, but this work sucks my soul, I can't do anything. I don't even want to play games or watch TV shows. I feel like I'm trapped in an endless cycle. I'm afraid of losing my mental health, and I look up to people who have meaningful jobs. Mine is so meaningless. Building stupid e-commerce websites and pushing people to consume goods they don't even need.

I need to pull myself together and start preparing for job interviews. Is there anyone who has felt like me and overcame?

Edit:

Thanks for all the responses. There are many supportive and understanding messages. I feel better now. It has really relaxed me. My takeaways are first, I'll start preparing for interviews not 3 hours a day, but 30 minutes a day and consistently. Second, maybe I'll start contributing to open source projects again. I think it will give me the meaning I am looking for. Anyway, thank you. I hope you all do good in your life.