The language being used in your initial contention is a little inflammatory, don't you think? "All I hear about spydercos is how great they are, but I bought one and broke it, so they all must suck. Oh, and that good stuff you hear about them is just hype"
For this to be fair, I think we should give you the benefit of the doubt and say that maybe you had a bad pivot screw. But your inability to deal with the problem is what got you the negative responses you're seeing.
I used to work as a computer technician and we had a term for problems similar to these: PICNIC ("Problem In Chair Not In Computer")
AKA: consumer screwed up, and is now blaming the hardware.
I don't think you should judge a company based on their cheapest/most entry level knife that costs $45
Not true. Although you should be conscious that a $45 knife will not be in the same league as a $200 knife, it's still a Spyderco. And should meet their quality standards.
I have four Enduras, a Tenacious and a Resilience. They are all awesome knives and I think Spyderco deserves a lot of credit for making such great affordable knives.
You should absolutely be able to judge a company by what they are building at the most inexpensive level.