It’s not difficult to overwhelm someone who tends to overthink things as part of their mental health struggle. This is quite common amongst depression sufferers. Non sufferers can exhibit and exercise their resistance to these issues by unhealthy means (losing temper, ignoring the tasks, procrastination), or healthier means (delegation, organising tasks, prioritisation).

Sufferers would tend to stick to unhealthy means, or simply be overwhelmed and be paralysed. Decision paralysis on simple tasks such as settling a meal is quite a common outcome.