The linkbuds s actually do alright, pretty good even as long as you apply parametric eq using wavelet or Poweramp or however else you might want to do so. I've personally found the best eq profile for wavelet to come from playing with different targets found on squig.link then adjusting to taste before generating the eq profile, I'd highly recommend giving it a try (assuming those pesky connection issues can be fixed).
As far as the connection issues go, if you haven't already, you may want to make sure (if you're using the LDAC codec) that the buds are set to "best effort" mode for LDAC. If not using LDAC, then there is also a separate option in the Sony Headphones Connect app for choosing between prioritizing sound quality or connection stability, which might also be worth trying out.