At Hogwarts, Argus Filch took a sadistic pleasure in punishing students who disobeyed school rules, and Albus Dumbledore recognized the source of the problem.
In the Harry Potter films, Argus Filch (David Bradley) was Hogwarts’ most bitter character, and Albus Dumbledore (Michael Gambon) was personally responsible for it. Filch was the caretaker at Hogwarts, but he was also a squib, a Muggle with wizard parents (which may be the case of Jacob Kowalski from Fantastic Beasts). Filch became a bitter man after decades of being around wizard trainees who reminded him of his incapacity to perform magic, almost as a form of retaliation for his failings.
Filch was employed as the Hogwarts caretaker by Dumbledore in 1968. Filch had already filled at least 1,556 boxes with punishment records by the late 1970s. Many of these detentions were granted to James Potter and Sirius Black, with Remus Lupin and Peter Pettigrew’s names thrown in. Filch also took the Marauder’s Map from James during the 1977-1978 school year as part of his plan to punish James Potter. Filch passes this resentment to James’ son, Harry, in Harry Potter and the Sorcerer’s Stone (Daniel Radcliffe).
Filch takes a sick delight in torturing children who breach school regulations by begging Dumbledore to let him hang kids by their ankles when Harry Potter arrives at Hogwarts. This raises a few doubts concerning Dumbledore: the headmaster was aware that Filch was a squib, and he had long watched Filch’s exceedingly undesirable behavior with the school’s kids. Why did he retain Filch for such a long time? Dumbledore was a powerful wizard and a compassionate man who always preferred kindness to bitterness. Even with Filch’s considerable knowledge of Hogwarts’ secret entrances and forbidden hallways, Dumbledore’s decision to punish his students harshly defies logic. Furthermore, Dumbledore must have known Filch was a squib when he employed him; At the same time, this employment provided Filch with shelter and security; Dumbledore must have realized that being a squib among wizards may cause Filch to become bitter and resentful.
Even though Filch made all Hogwarts students his adversaries, Peeves the Poltergeist was his archenemy during his time at the school (which arguably continued even after the Battle of Hogwarts). By provoking Filch to go after students for small (or even fictional) reasons, Peeves reveals Filch’s dominating and paranoid nature. Filch holds students responsible for Peeves’ mayhem and holds Peeves accountable for students’ mistakes ( “Peeves, you’ve gone and stolen a Triwizard clue… You filthy, pilfering poltergeist, Dumbledore will have you sent out for this “(Imaginative+ paraphrase). This exemplifies Filch’s perpetually agitated state of mind, which Dumbledore undoubtedly observes.
Filch’s bitterness stemmed from his inability to perform magic as a Muggle, which was well known among Hogwarts students. Ron concludes when he finds his Kwikspell letter: “Filch must be a Squib if he’s trying to study magic from a Kwikspell course. It would clear up a lot of things. Why does he despise students so much? He’s enraged.” Aunt Muriel sums it up best when she states that attempting to assimilate Filch into Muggle culture would have been gentler. She was undoubtedly correct: Argus Filch was never pleased with Hogwarts, and he allowed his dissatisfaction spill over to tens of thousands of pupils. Filch spends all of his time in the Harry Potter series hating students and punishing them for his ongoing frustration, so, surprisingly, Dumbledore never offers him an exit – or a job outside the realms of witnessing magic all day – because the Hogwarts caretaker spends all of his time hating students and punishing them for his ongoing frustration.