Some people delight in pointing out grammatical errors. For example, “Some people delight in blowing things up really good.” is likely to attract them.
The issue: However, the sentence is grammatically correct. It does not discuss being skilled at blowing things up. A villain might delight in blowing up good things, especially things that are really good. Adding a few words will make the point clearer: “Some people delight in blowing things up [that are] really good.”