Many debunkers are rather controversial because they have strong opinions and can be vocal about things which may offend people, such as religion and what they label pseudosciences. Some maintain that some debunkers are excessively and dishonestly skeptical, and thus not true skeptics but pseudoskeptics. Real skeptics are neutral or agnostic, often critical of new claims, but not vehemently opposed to them. They want better evidence.
In contrast, pseudoskeptics are simply deniers with an agenda and often use unscientific arguments to debunk what they oppose.