That is not my intent. As I said, I think Model 3 will sell well, especially lacking competition. And yes, the notion that Model 3 could have been a better car that it seems to be turning out, is my personal preference and opinion only.
That said, I do think there is some broader market research/sentiment that is relevant beyond these subjective comments. Hatchbacks and station wagons are immensely popular especially in many parts of Europe and sedans are not that well liked. A lot of European posters on TMC have noted how few sedans they can actually spot on the roads. I guess it is not quite as bad as station wagons and the U.S., but sedans are kind of rare in Europe still. That will be some headwind for Model 3 here, no doubt. Not disasterous, but headwind still.
Making a car that can be sold as a sort of sedan in the U.S. and a sort of hatchback/station wagon in Europe makes a lot of sense IMO, if variants can not be offered (as most manufacturers do, but Tesla really can't). Model S is such an example that makes a lot of sense IMO, given the differences in the markets.
As for trunk covers, only Tesla seems to have a problem with having them in the premium class. All premium vehicles I've owned prior to Tesla that were hatchbacks or stations wagons or SUVs had adaptive and/or automatically rising trunk covers (that were removable) hiding the stuff. Of course Model S one that is a bit crap and Model X has none these days, so there is that. But on average I don't see that as any kind of issue in modern hatchbacks...