Patience Padawan. Patience.
I do think that the combat have not “clicked” for you yet. Perhaps part of the frustration comes with fighting against the game, as in playing it like some other game?
Flow with the Force.
Getting used to the combat in the starting areas (in the System Map, see that the difficulty is “Normal”) is key to learning I think. Most games gate the difficult areas, but RGO allows freedom, which will lead to many deaths of Padawan learners.