guess something must had “upset” at

guess something must had “upset” at that moment. Since you have insisted to leave the company, we definitely will respect your decision and appreciate all your good contribution.
Hope all the best for your future endeavor.

ผลลัพธ์ (อังกฤษ) 2:

guess something must had "upset" at that moment. The Company You Have since insisted to leave, we definitely Will Respect your decision and Appreciate all your good contribution.
Hope all The best for your Future endeavor.