In my experience ( 40 years+ country and continent hopping on a weekly basis )
If you book a ticket direct from an airline with connecting flights - especially if the connecting flight is one of theirs -and they F*uck up then you are ok !
They fall over themselves to sort things out - upgrade - hotel overnight etc etc

If the connecting flight is another operator they do their best but without any sense of urgency

If you booked and paid for your ticket through a travel agent they refer you to the issuing agency and say get them to sort it out !

PS This was before electronic tickets so it may well be different now though !