It's not like "funding" magically makes a company great. In fact funding may mean a quicker demise for a company. If you have funding AND the right everything else, then yes, you'll make great products.
As far as Mizuno goes, I have never seen or heard of one that was defective. Mizuno's technology rests on the principle of a wave to reduce shock and provide stability. There's probably something better but as of today I do not know what that is. I've tried the other brand's technologies and they all fall short. It will be difficult to come close to Mizuno in terms of this technology and quality. Go to a shoe store and compare. Hold them in your hands. It's obvious.