The old expressions,
"Never say, 'never'."
and
"You can't tell a book by its cover."
are as true for bowling as they are for many other things in life.
While I've found balls that didn't work for me initially, they did later on other conditions or with another drilling. I have also found balls that seemed to work great in the first 2 or 3 practices, but never worked in any league or tournament thereafter. Lastly, I have found balls that didn't work first time and never did work, but they were few and far between.
If I may suggest ...
For any ball that does not appear to work the first time, put it away for a month or more. Then dig it out and try it again on another completely different oil pattern. You've got nothing to lose and everything to gain.
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"We get old too fast, and too late, smart."