There was too much work; he couldn't bear the annoyance.
Tips
usage
不胜 is formal and literary. The fixed phrase 不胜感激 (bùshèng gǎnjī) is a common written expression meaning 'extremely grateful' / 'I cannot overstate my gratitude.' Other common compounds: 不胜其烦 (pestered beyond endurance), 不胜枚举 (too many to list).