Chosen Solution

One rotor is not spinning fast enough in take off on my drone so it takes off diagonally. Because of that it ended my drone up in a puddle of mud. It still works but the rotor does not spin and needs me to flick it to make it start to spin. But even then it takes off diagonally.

It needs a new motor or the power controller is bad for that channel. Is it trimmed correctly?

The motor or the ESC is bad. The direction that it flies to is the bad one. If a brushed motor on a toy grade quad replace the motor.