This happened last week, for the first time in flying Qatar for over 15 years, we didn’t make a flight connection.
We flew in on QR4 from LHR ETA 2350, ATA 0008. (18 mins late)
Due to connect with QR1002 DXB. ETD 0055.
We were off the plane at 0020 & straight into the terminal, no transfer security, at Gate B3.
We rushed to Gate C93 (bus gate) & were there at 0030hrs (25mins b4 departure)
At the gate it was showing “Final Call” & they were actively looking for DXB pax.
We made it, so we thought, Boarding passes scanned, beeped & gate agent mumbled something about Sharjah?
Then the other agent said we were offloaded due to missed connection, I pointed out the “Final Call” & we are here.
She said rebooked to Sharjah in 7 hours, I was not happy, then a Supervisor took us away from the gate, upstairs & pointed us in the direction of Customer Services.
If the flight was closed, I would have just accepted it without any issue.
QR1002 departed at 0127hrs (32mins late). 57mins after we reached the gate.

Was I right to be annoyed or is this usual practice?

Also when we deplaned at Gate B3, they were actively looking for Tehran pax, but not DXB pax, ETD0055 the same as DXB flight.