Reviewing isn't an occupation. I just get endless emails badgering me into accepting to review papers. If you say you can't, they demand a suggestion for someone who knows more. The problem is, there aren't many people
Unless it's specifically part of your jobto do so, you have the right to say 'no' to these emails, especially when you're already struggling with your mental health. Prioritize your own wellbeing over people who are so entitled that they make demands that are uncalled for.
It goes without saying that it isn't an occupation. You are not helping anyone by doing sub low quality reviewing. It would be better if noone reviewed than getting low effort reviews like what you are describing doing.