Better luck next time
I like your screen name, too. I instructed Alitalia students at FlightSafety in Vero Beach, Florida, ten years ago.
I agree with the above. I had a friend who struggled with Mesa initial training twelve years ago. Ground school came at him hot and heavy and he couldn't keep up, although he studied like crazy. And, in those days, Mesa ground school wasn't much. I think the problem was lack of preparation. Everything was new to my friend.
The key is advance preparation. Try to get some gouge ahead of time. Ask if you can get all the manuals, diagrams, checklists, flows, etc. before ground school. The answer might be "no," but try anyway. See if you can get the stuff from people who are already there, bearing in mind that it may be taught differently in ground school.
You must admit what happened on future apps. You must exhibit a positive attitude at the interview. You would say that you learned from the experience, that you are a good pilot and student, and you now know what it takes to pass a rigorous training program, etc.
Best of luck at your next class.