I had a poor experience with the “new” STI (Staccato) as well after receiving great CS when they were STI. 2 years ago I purchased a new Costa .45 from Dawson Precision their premier distributor. I returned it to Staccato when the red dot site it came with flew off while shooting at the range...
Just as a comparison, Luckygunner.com has 100+ .45 ACP items for sale by various manufacturers and quantities. Sorted by price per round shows 20 items cost less than these rounds. Hope that's helpful.