With ADSL: broken waterproofing somewhere along the line, water gets into the cables or connections == broken while it's raining.

Then you call their customer support, tech comes out, it's not raining anymore and everything works, and the problem doesn't get fixed.

Exactly what I am suspecting! I called so many times: nothing found all works as expected.

As for the starlink: I noticed that clouds or weather ( rain snow ) does not have a true effect. Must be the frequency is not absorbed by the water in the air or similar effects. Only hard blocking with construction or big canopies of trees is struggling.