This ties in to Hasbro's perception of the _stores_ as their customer, not the actual end customer. They care not if the end customer enjoys the product, as long as the retailer buys the assortment in the first place.
Even if you do return the products to the store, the store loses out - not Hasbro - since it's the store which loses out. They have to try and resell an opened toy. It's not cost effective for them to return it to Hasbro, and that would require a lot of negotiation anyway.
I've already given up on Hasbro's products, for the most part. I'm not boycotting them, but I'm quite happy to simply pass over something rather than spend my money on a poor effort. I'm knowledgable enough about their packaging tricks (and photoshopping is a big part of that) to know that emphasis is on making the packaged toy look good - not on delivering the best product. Which is why I'm willing to wait for an imported option from TT if that provides a better option. Granted, that means the local retailers misses their cut, but if I'm spending my hard earned, I'll do it because I believe it's worth the money, not because the packaging convinces me. I learnt the hard way from some of the poor toys I've bought down the years, only to end up regretting it.