what ever floats your boat, Ive just seen this so many times before
I mean, if you want to cherry-pick names, you can find successes and failures for every algorithm out there. For example, NXT, NAV, BlackCoin, etc. are all PoS and are doing fine. Ethereum, the #2 market cap, is planning to switch to PoS. And if you really want to play this game, literally hundreds of PoW coins have died in the past few years--does that somehow invalidate all PoW coins (like BTC...)? And of course PIVX isn't solely PoS; it was PoW + masternodes, and is now PoS + masternodes. In that sense, it is a hybrid in the vein of DECRED, Peercoin, or DASH.
It's the Devs and the community that make a coin succeed or fail, not the algorithm alone. PIVX is fortunate to have a large, active, supportive, and rational community. I know you're just trolling, which is fine, but please at least put some facts behind your FUD. Constructive criticism and carefully considered ideas to improve are always welcome; 'alternative facts' less so.