You are almost all correct, great job! I'll go through each question below.
Subjects: Your answers are correct.
Complete Predicate: This should be the whole rest of the sentence that isn't the subject. So for example, in 1. the complete predicate is "just appointed Donald Trump as Dictator". I'll leave 2 and 3 for you figure out.
Direct Object: Your answers are correct: Donald Trump, none, a kick in the leg.
Indirect Object: Your answers are correct: Doug is the indirect object (good job, this one is tricky to figure out which noun phrase is the direct vs. indirect object!)
Object Complement: you're correct, "dictator" in 1. is the object complement
Subject Complement: you're correct, there are none in these 3 sentences.
George L.
Thank you!03/02/20