How is "modern capitalism" to blame? Modern capitalism allowed a small business to sell you the higher quality option, and you were able to direct your purchasing power to the product you wanted. If you convince more consumers to do the same (like you are) big brands will loose money and change. That's capitalism.

The best term I can come up with to describe the phenomenon you dislike is _modern consumerism_ (although not perfectly accurate). Many people now want more new stuff cheaper. That's what drives companies to produce things more cheaply.