Being on time and money handling are not insignificant issues.
A person who is chronically late without good reason (esp without letting the other person know - or who leaves us waiting at a venue for them) shows a degree of conceit. This type of person views themselves as being far more important than the person who is left hanging. Not a good trait in a partner.
Money is an issue which breaks more relationships than anything else. Having similar views on money handling is crucial for healthy relationship.
Think about these things further before you write them off as being trivial.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.