title_body: Quadcopter rotates too slow
upvoted_answer: I think this problem had two different reasons; two screws that held the flight controller were a loose, and there was likely a problem with the connections between the gimbals and mail board on the transmitter.
  The screws that were loose were both on the same side, which caused the FC to &quot;lag behind&quot; the movement of the quad and thus giving false values to the PID-controller. At least that is my theory.
  The problem with the transmitter was not as obvious, but I whan looking at the reciever tab in Betaflight Configurator, I noticed that the roll channel acted almost as if it was smoothed. Even if this wasn't visible in the radio I still tried to unplug and replug the connectors to both of the gimbals, something that was recommended on a few forum threads I found.