The gerund in this sentence is "learning". A gerund is a verb form which is acting as a noun, in this case after the preposition "in".
Most likely posiden for ruining everything for the protagonist
Answer:The sentence above is a simple sentence.
Explanation
The sentence above is a simple sentence because it contains only one independent clause. Simple sentences have no dependent clauses. Moreover, they are also called clausal sentences and they may have modifiers besides a subject, a verb, and an object. On the contrary, compound sentences join two or more independent clauses with a coordinator such as for, and, but, or a semi-colon.