One challenge could be Harry's distrust. Harry has had a long - standing enmity with Snape, so he might be reluctant to accept Snape's help. Another is the complex nature of Harry's problems. Harry has faced so many traumas and has a big destiny to fulfill. Snape might find it difficult to address all these issues without overstepping boundaries or causing more harm.
Well, Snape may struggle with Harry's stubbornness. Harry is used to doing things his own way and might not easily conform to Snape's methods of 'fixing' him. Moreover, Snape has to balance his own emotions. He has mixed feelings towards Harry's father which could cloud his judgment at times. Also, the magical world has its own set of rules and expectations. Snape has to work within those while trying to fix Harry, which adds another layer of difficulty.
Snape might face the challenge of his own biases. He has had a long - standing dislike for Harry's father, and this could initially cloud his ability to help Harry. Also, the wizarding community may not fully understand autism, so Snape could face resistance or lack of support when trying to implement special accommodations for Harry.
One major challenge is Harry's initial distrust. Harry has known Snape as a mean - spirited teacher, so it's hard for him to accept Snape as a guardian right away. Also, Snape has to protect Harry from the threats of the wizarding world, such as Voldemort's followers. He has to constantly be on guard and anticipate any potential attacks. Another challenge is dealing with Harry's friends. They might be suspicious of Snape too, which could create problems when Snape is trying to keep Harry safe and make decisions for him.
One big challenge is their pre - existing relationship. They've had a lot of conflicts in school. Snape has been rather harsh on Harry, so they need to overcome that animosity. Also, Snape has to deal with Harry's trauma from the Dursleys. He needs to help Harry heal and grow in a positive way, which is not easy for someone as emotionally reserved as Snape.
One big challenge could be Snape's natural inclination towards the Dark Arts. Harry would have to constantly keep an eye on Snape and try to steer him away from that path. Also, Snape's personality is often prickly and guarded. Harry would need to break through those barriers to really connect with him. Another challenge might be the expectations of the wizarding community. People might not understand why Harry is raising Snape and could be suspicious or judgmental.
One challenge is dealing with their different personalities. Harry is brave and headstrong, while Draco is proud and used to privilege. Snape has to find a way to discipline them without causing resentment. Another challenge is the expectations of the wizarding community. People have certain views of Harry as the 'Chosen One' and Draco as a Malfoy. Snape has to protect them from those outside pressures.
One challenge is his negative attitude towards Harry in the original story. It's hard to suddenly make him into a love interest. Another is his mysterious side. Writers need to figure out how to make his secrets fit into a romantic relationship. Also, his loyalty to the Death Eaters at one point and then to Dumbledore later is a complex web that's difficult to untangle when writing a romantic scenario with Harry.
Snape and Lucius might be too proud to take instructions from Harry. Since they are used to being in positions of authority, they may not be very receptive to Harry's teaching at first.
He might face the challenge of acceptance. The Snape family may be hesitant to welcome Harry, given Snape's complex relationship with him at Hogwarts. Also, there could be differences in magical practices. The Snape family might have their own unique ways of doing magic that Harry has to adapt to.
Another way Snape could comfort Harry is by standing up for him in certain situations. Maybe when other teachers or students are being unfair to Harry, Snape steps in and defends him. This act of protection can be a great source of comfort for Harry, as it shows that someone is on his side even if they have had a rocky relationship in the past.
In some fanfictions, Snape might use his advanced knowledge of potions to brew a special healing elixir for Harry. He could also use his magic skills, like a complex spell specifically designed to mend Harry's wounds, whether they are physical or emotional.