Mortymoto's journey

I've been working at my current job for three years, which is my first professional role since graduating college. Lately, things have taken a turn for the worse. My boss, who is the CEO's son, has been making my life difficult. He recently hired his younger brother for a position above me, even though I've been with the company longer and have more experience. Over the last nine months, I've taken on more responsibilities without any raise in the past 1.5 years, and our mid-year bonuses have been cut for the last two years. This summer, my boss has had us doing tasks that are completely unrelated to our job descriptions, which has been frustrating. I'm planning to start looking for a new job, but I'm unsure how long it will take—could be anywhere from one month to six months. Honestly, I don't know if I can mentally handle staying in this job for another six months without losing my sanity. It's starting to affect my mental health negatively. I'm considering the idea of getting fired so I can claim unemployment while I search for a new position. However, I don't want to create a scene or get fired for misconduct, which could jeopardize my unemployment benefits. My current thought is to start making mistakes on purpose, hoping they would let me go for performance issues. I know this isn't the best approach, but I'm feeling stuck.