>>2621159The series had 3 big villains and never focused all that much on any one. First there was Emperor Zarkon, Lotor's Father.
Lotor wasn't introduced until season 3.
Lotor killed his father in season 5, then then there was a power vacuum fought between lotors, and Honerva/Haggar (his mother).
Lotor was killed at the end of Season 6, and his mother then became the big bad for the rest of the series. The motivations for all 3 were different, but you could generally replace any one of the 3 with "space hitler" and nothing would really change.