I've put many rounds through my UC9 Pro and it's just fine. No slop, no cracks....
I'm aware of many who have put thousands of trouble-free rounds through their Bersa Thunders and so far have only read about a couple frame issues.
Look around long enough and you'll find every brand has experienced failures. If we're going to write off a brand due to a very few reported failures, then Glock would be considered hand grenades by now.
I sincerely doubt frame breakage is typical or systemic among the Bersa brand.