I read all reviews before purchasing 2 of these during Black Friday sales. I thought most negative feedbacks are not relevant and realistic. If the TV is unfortunately dead out of the box, probably not JVC's fault but due to a freight shipping method. 2 of my units arrived within 3 days and the TV's were in perfect condition even their carton boxes were slightly damaged. You cannot expect to pay 300 for a 55in ultra 4K and ask for tons of extra such as 'smart', 'theater sound', etc. You should read and understand the specs and able to compare with other TV's & prices. Only one thing I'd I do admit this model lacks of aspect modes which they would not be able to scale the input signal (only wide and normal available). This can be a little tricky for those who stream internet contents via an external devices with Kodi.
Many decent and cheap external spkrs intentionally designed and built to add sound to these Slim TV's so you should look into it and stop complaining (ALL slim TV's have poor sound - I do have a high-end model that has 16 spkrs builtin the bazel. It still doesn't give me a great sound but costs 1K extra)
Note: JVC is a major respected Japanese electronic corporation (owned by Panasonic & Kenwood). You are buying one of its products. It's not RCA, Emerson, TLC, UpStar, ProScan, Avera, Seiki, GPX, etc.