You’re wrong about needing a new soundbar
TV audio is a very important factor in your viewing experience, and I often find that bad audio is worse than bad picture quality. It feels like there’s always something I can tweak to get some better-looking images, but audio is stuck being bad if I’m dealt a bad hand by my TV’s speakers. The answer for people with audio trouble is to grab a soundbar, and while I won’t argue with that, you might not actually need to go out and do that.