GR00T: Sony, for reasons already stated.
Kitchenaid - for a complete lack of support for the refrigerator we bought (which I ended up repairing myself) and for the piece of shit 'high end' dishwasher we bought that has needed both the left and right adjustable upper rack supports replaced, 3 of the 4 lower rack dual wheel assemblies replaced, and now the water pump is going. Dishwasher is only 2 years old. And no response from various support requests. Fixed all issues myself (except the water pump. That's next).
LG - Bought a washer/dryer combo and the washer started leaking. Found out it was a simple 10 dollar hose that eventually wears out. No big deal and a relatively easy fix. The issue? You can't buy the hose in Canada. Oh, it's stocked in various warehouses, but no one is allowed to sell it to the average Joe. No, you have to call an LG technician to install it, which will cost a minimum $150. Meanwhile it's easily purchased in the US at various outlets. Luckily, a friend has an address in the US so I ordered it to his address, he picked it up, and brought it to me so I installed it myself. Total cost, including exchange: 16 bucks. Fuck LG if they want to soak their Canadian customers like that.