If your statement "ethereum is flawed" can be resumed as a few mispriced ops that have been fixed ( there may be others ) is your proof that ethereum is flawed, then you've been wrong all along, and it's just jealousy.
About POW, even as a non technical person i agree generally POW is flawed, just because all you have to do to attack is rent hashpower. I think vitalik calculated somewhere what amount would be needed to attack bitcoin, i think it was around 20mil if i'm not mistaken.
You can't possibly know wether or not casper is flawed, it was all theory when vlad posted it on blog. Since then it was probably reworked tens of times, debated behind closed doors, and so on. You can't possibly know all the details and your opinion is based on early casper posts. Not to mention i don't believe you've studied it and all the later casper posts in the smallest detail, thought about every variant, just so you can post that fud on bitcointalk. You don't even have anyone to debate with, so you'll go with "whatever i think it's right". Anyway, even if you did, that'd mean you have too much free time and actually you're not working on any project, despite your claims. But what you do, saying it WON'T work, well, that's easy. You do that technically to draw attention to yourself, because what EF is doing wasn't done before so you know there's a big chance they might not accomplish all their objective, or even fail completely. In any case, if 1 out 100 parts of the project won't perfectly work, you'll still go with "i told you i am right", the very same thing you did with " ethereum is flawed" when, currently, all ethereum flaws so far were a few misspriced ops. Being a critic is easy, they are trying to achieve something, alot of thesse kind of projects out there are, not just ethereum.

Edit: based on what ethereum currently aims to be, a platform for DAPPS/ smart contracts, i don't think EF aims for it to be "perfectly decentralized", like, having 100k potential validators, each owning ~1k ether. It has to be well enough decentralized, to both avoid centralisation but also to avoid people's perception of centralization since it doesn't go well with the positive sentiment ( look at bTC ). So, it doesn't have to be perfectly decentralized, but currently it's probably one of the most decentralized projects out there, probably along with some other asic resistant projects. Maybe not ETC, it's known a few mining whales in china switched mining on it as a bet. Few months ago when i checked, ethereum had like twice the number of nodes BTC has.