My suggestion: people notice when it appears to be more corporate and calculated. Products for D&D are carefully marketed and targeted for sales and effect, which is all fine in principle but tends to work against experimentalism and innovation. This is especially obvious to gamers who are also familiar with computer gaming, which is deeply in thrall to corporate marketing design strategies aimed at maximizing monetization of the product.
You can, of course, find lots of experimental works and interesting and unusual new stuff in the indie RPG crowd, though, so the issue (as I see it) is mainly with WotC products and the key support network which surrounds D&D 5E as a brand. For me personally I am not bothered by this, but I do understand what the OP is having issues with.....I just do my own thing, and stick to what I like (and honestly I think WotC's strategy is producing some great stuff, so ymmv). The fact that D&D 5E is so popular just means its easier than ever to get a game together, as I see it.