Nah, there’s something else that’s triggering it. Average length of credit matters a lot, so if you cancel cards and get new ones frequently that would do it.

Long term debt for sure is good, carrying balances on cards is never rewarded.

The reason they’re OK extending credit when you have debt is because they can see you are managing it. Mortgage or auto loans (asset backed) aren’t bad. Don’t carry balances on cards ever if you can avoid it.

As another poster said, there’s probably no functional difference for you between 750 and 830.