Funny ( actually NOT) But I had a similar experience with my VW EOS convertible.
I bought it " new" with 50 miles. I figured 50 demo miles...
I bought it from a dealer unseen ( over the internet). $10,000 off sticker . Told it was a Three year old unsold LEFT OVER.
Well untold to me was the fact the car was a friggin " mechaincs training car"...... that means that VW used the car at their training facility in Michigan (headquarters) be used for training service mechanics. So when I got it it was 20X worse than what you describe.
My service writer, after calling corporate VW and mentioning/complaining to them that the car came off the line with such major issues, was the one that told me that VW reluctantly admitted that they had the car in Michigan and used it to train mechanics.. Frinkin UNBELIEVABLE!!
Dealer AND VW CORPORATE knew this all along form the get go ,yet just had the car put back together and sold as "new"
I had full warranty and all was fixed ( I hope so far, fingers crossed) , but the car was in the shop the first two years for at least 6 months in total to sort out all the problems.
I was so angry. Just like you, hoses not put in the right place, pieces falling off, screws missing, when I went for an oil change , the guys showed me a rag that was left inside behind the screwed in engine plate. Wiring connected wrong, alignment way off, right window indexing only sometimes, burnt out dash display replaced, radio replaced 4 times due to faulty wiring , convertible top motor blown within 5000 miles, roof leaking like a faucet, and even some minor trim parts missing.....The friggin list goes on and on....
I only paid $27,000 for the car so I finally let it go, BUT for VW corporate to pull a stunt like that and sell the car as a left over NEW car on Cert of Origin ?
I thought Sealerships were low lives... I now found out manufactures are also
This experience has Nothing to do with your VIPER but just wanted to share me understanding your frustration.