I see these things more as fat grey lines rather than sharp black lines of right and wrong. Designs make compromises to try and achieve a balance of goals and cost effectiveness.
A simple example was certain car components back 50 years ago were extremely robust. Forged crankshafts, forged connecting rods, knuckle joints etc. they would almost never break under normal use and could even be modded up to much higher horsepower. This was back when gas was 19 cents a gallon and mileage was never even considered when purchasing a car.
Jump to today and you have multiple competing constraints. Strength being only one. Weight to save gas. Reduction in size of components. Greater cost consciousness. Increased materials cost. Tighter profit margins. Safety concerns, crash ability survival. All needs that are balanced in today's designs. My turbo charged 4 cylinder engine broke a connecting rod and holed the cylinder block trashing an engine costing $8K to replace. No warranty as it was 1000 miles past limit.
So a phone that bends when too much pressure is applied. Well it's a tough shitsky in my book. As vast majority did not bend their phones. That Apple improved the next ones with both material and slight design modifications to shape and re-enforcement around button holes is testament that they are concerned and do try to improve.
All the companies try to improve the next generation of phones and most will stand behind what they sold with reasonable warranties. Some of the nit picky grievances I read on here amaze me. Personal preferences, OCD issues, and outright little princess tantrums over some feature are a bit over the top. And before I get blasted, that's my opinion. And I have just as much right to voice it as the person complaining about a noisy button.
