I disagree. A team with Autimatic, Kioshima, Rush and Flusha ought to at least be a top 15 squad. Not a world beating team but a good one. Rush has always been a player who's just a solid team away from having a career best year and both Flusha/Kio are known good quantities. Autimatic is a great player who maybe even further improves.
But you sound mostly like a hater which is fine. Everyone is entitled to their opinions. For example I'm of the opinion that if you think C9 is a borderline top 20 team then you probably also think Fnatic is as well considering the results from IBP and following the same logic.