At one’s wit’s end
“At one’s wit’s end” means feeling extremely frustrated, confused, or helpless when facing a challenging situation. It implies that a person has used up all their mental resources and is struggling to find a solution. The idiom conveys a sense of mental or emotional exhaustion and a feeling of being overwhelmed or stuck.
Overall, when someone talks about a “heavy burden,” they are expressing the feeling of being weighed down by something challenging or demanding in their life. It’s a common way to convey the sense of being overwhelmed or struggling with a significant issue.