Quite right - I think that on many occasions, Mazda engineers get too anal about some of their design concepts (persisting with the rotary engine, for example), continually giving each one some flashy Japanese 'legend' name as if they are some mythical figure, rather than an inanimate piece of technology - and to the detriment of many failings in previous cars that seem to continue on to the next generation model, despite hoardes of customers complaining about them - the saloon/fastback's boot aperture and the relative poor use of interior space (including of the boot) compared to rivals, dating back to the gen-1 cars. Not sure if them ignoring complaints about cars' shortcomings are arrogance or just poor management. Either way, not good.
I remember when the gen-1 car appeared, and wondered why the hatch - the same size as the equivalent Ford Focus mkII, had boot that was around 20 litres larger but with a body that was 70mm shorter, plus the saloon version of the Focus was 100mm shorter than the Mazda3 equivalent, and yet had a boot that was nearly 100L larger - all with better leg room in the back seats. I may have gone for the Focus (1.6 petrol) had I not found my car on such a great discount at Motorpoint, given that it met all my criteria, aside from getting cube-shaped boxes in the boot (a rare occurrance).
I think people are slowly going back to good old 'common sense' purchases of cars - going more for value and practicality than purely on looks and performance. Mazda have improved, but as we see, they still are distinctly lacking in some areas and have been for some time now. It's a right shame, as the time is ripe to strike hard at rivals who have been struggling (even before the COVID pandemic) - they could easily pick up significant numbers of customers that have been moving from Honda and, to a lesser extent, from Toyota and Ford, to the likes of Hyundai/KIA and Skoda.