First, @noromance covers it pretty much. ADSL/DSL is like 30 year old technology with extremely limited bandwidth. I'm not really concerned with the physical connections, but the back switches and routers on those circuits are probably just as old and will never be upgraded. Consider cable, fiber or 5G based Internet as a much better options.
Generally speaking though, most streamers have enough buffers that they can ignore normal internet latencies, but not errors and reconnects. Roon for instance has the ability to choose how much of a streaming buffer you use to try to eliminate this issue.
Next, if possible, avoid Wifi streaming. If it's not possible to avoid it, use a phone or laptop Wifi analyzer app to ensure your router is on an unused channel.