PID settings or trimming?

Hi I have Multirotor PID problems with tendencies to roll one way, pitch or even steer off coarse such as when trying to hold a straight course and it tends to go slightly off course.I have had these problems with a few craft but I don't really know what I'm doing when trying to fix it and often can never get it fully tuned because I'm doing something wrong. If I use PIDs normally I can only adjust the way the craft responds to RC input or how it corrects from external force or after a manuvuer.So to try clarify;My craft wants to roll to the right on take off but after take off it is fairly stable. Also it wants to yaw one way and pitch forward. Using throttle PID I think is what to correct the yaw issue but as for the others I'm unsure.

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