In a word ... YES.

The Columbo I recognize ended with "Last Salute to the Commodore" which was not only an ironic cap, it was easily the worst installment of the original series ever produced.

As far as I'm concerned, anything made after that rates as nothing more than commercial overkill.

Of course, a few episodes in the 6th and 7th seasons had some merit, but not nearly enough to warrant a purchase of the DVD's.