I wonder how many relationships this pandemic has shone a light on and ended. I also wonder why it takes people so long to see the obvious. Good for you for leaving. They won't learn or change, though. They'll just find another sucker to do all the work. That's what they do.

Glad you're getting out. Take this opportunity to reflect on how you ended up in the situation. (Emphasis here not on blame but on growth.)

This may not save your relationship but for others... sit down at a quiet time and talk about your frustrations. Out loud. Be calm. Do not assume that the person should know better. If they knew better, they'd do better. Together make a numbered list of every chore. Don't keep it locked in your head. Make a schedule. Be specific. Agree ahead of time as to who does what and when. If the recalcitrant person is a typical hetero male do not under any circumstances watch them, supervise, or criticize them in real time as to how they did the task. Unless you want to GUARANTEE failure. Did they do a shitty job and you have to redo it? That's an old trick to get you to start doing it again. Instead wait several days and then have another sit down. Explain your frustration again. Make damned sure the person knows that you're not going to go behind them and clean it up. Say that you expect them to do better. Be firm but fair. Good luck!