To answer some questions
Can you commute? You have ONE four days off block every month. You need to be in Doha 12h before next duty starts + do antigen after you arrive. Its not commutable.
For people waiting replies from HR, thinking they are inefficient, wait till you join... The max time from interview to reply stands at 1 year and to join at 4 years. Note that you'll need to do the interview again after a year as it expires.
For people who have joining dates postponed, can be up to a year postponed at which you need to do interview and so again.
Last minute change of fleets from Airbus to Boeing... The airline tries to bond as many as possible pilots since most otherwise ran away before 3 years. They are doing the same with rejoiners.
If you're smart, don't give up your job to work at QR risking to be soon unemployed. If you don't have a job sure why not... Worst years of your life are ahead of you but you get some reasonable money to compensate your loss of health and to never see your family.
For first-officers, command stands at 12 years or more, you'll never last that long flying 1200 block hours per year so if that is something you look for than definitely wrong airline.
Whatever negative you read about Qr is just the tip...
Best of luck you'll need it!