I would recommend a used Aurender streamer (N100… I have one, see my profile). These are very high quality and make up for all the insufficiencies of networks. Both of mine play flawlessly while I can’t get my iPad to refresh the screen. If you are not near your router, just plug in a wall wart wifi extender next to your system and plug Ethernet cable into that.
About DACs. Less expensive DACs frequently excel at some things and not at others. The better the DAC the more all aspects improve. I would sell both and get a better DAC. Don’t evaluate on the basis of what technology they use, but on the basis of sound. Not sure of your price range but a Schiit Yggdrasil (~$2K) is and outstanding DAC that does not have any weaknesses.
Yeah, the phone needs to get out of the loop. That is a great way for really terrible sound. Use your phone as a controller. This is how dedicated streamers work.