I agree that 1:45 is plenty of time for a DOH connection when the doors open on your arriving aircraft. My recent experiences, however, have led me to select flights with a minimum of 3 hrs connection time whenever possible. I’ve had too many late arrivals in the US leading to late departures back to the connection airports. Recently my 3.5 hour SEA-IST connection turned into a 1.5 hour connection because of a very late SEA arrival and subsequent departure.