I hear what you are saying and some Chinese stuff is getting better but it's still based on older designs and really old construction which can be OK for the average punter. Cobra is leading edge shapes and hi tech construction. Once upon a time you could walk through Cobra but not anymore it's all top secret and for good reason they have sunk millions into the new construction processes and add to that all the designs are from some of the best shapers in the world.
Compare it to the 4WD industry the Chinese have some amazingly cheap 4WD'S that do the job , but they still pail in comparison compared to the Toyotas ect. You get what you pay and the poor man will always pay the most.
Over the last couple of years Sup design and construction has just moved forward so fast giving us lighter , stronger and more torsionally flexing super high performance boards. Unfortunately for us this means more cost to build with hi tech composites & bullet proof construction. Add to that the weak Aussie dollar it hurts bad.
Owning a couple of brand name short sups and a couple of race boards now puts you way over 10k

that's big coin , it comes down to your passion and what you want and can afford out of the sport. Customs from your local shaper are still a really good option but resale on a brand name will always get you more.
Just ride and pay for what you can afford, when we are all out on the water we're all the same just sharing the stoke.