Let’s hear from the man himself:

Reflecting on his crash after qualifying, Hamilton said: “I’m incredibly disappointed in myself, ultimately, and so sorry to the team. Everybody worked so hard to put this car together and I never like to bring it back damaged, and we were fighting for a top-three I think. I don’t have an answer for it. I swapped the back end in Turn 7 and that was that.”
 

https://www.formula1.com/en/latest/article.im-incredibly-disappointed-in-myself-says-hamilton-as-mercedes-drivers.60WictI92vkoN9uEJSYEn8.html