1. Incorrect verb tense: The sentence uses "must have felt" which implies a past event. However, the main verb "dealing" is in the present tense. This creates a tense mismatch.
2. Subject-verb agreement: The sentence lacks subject-verb agreement. The subject is "the king," which is singular, but the verb "dealing" is in the plural form. It should be "was dealing" to agree with the singular subject.
3. Inappropriate adjective: The sentence uses the adjective "ungrateful" to describe the brats. However, the correct spelling is "ungrateful."
4. Incomplete comparison: The sentence uses the phrase "like he was dealing" which implies a comparison, but it leaves the comparison incomplete. It should specify what the king was comparing the brats to or how he felt like he was dealing with them.
The corrected sentence could be: "The king must have felt as though he was dealing with a bunch of ungrateful brats."