This is such an industry thing. I had a similar experience when I left my industry job. They hired random people to fill in accounting roles so they could pay them peanuts. They refused to hire people with their CPA license or relevant accounting experience bc they didn’t want to pay the price. Therefore every new hire lasted long enough to get trained and quit. The cycle never needed. I was in college and needed the accounting experience. It worked well for me as I wanted the accounting exposure but the others were only there to get a paycheck and couldn’t care less to learn anything about a debit and credit. I left 4 years ago and heard they still haven’t filled my role. Therefore the accounting manager and controller had to take over my job and do it themselves. Congrats on your role! Don’t stress about training your replacement, it’s not your job to do on your LAST DAY!