They can go to their own Houses, and do not have all of their classes together. The canon books, and MoR, spend considerable time focusing on inter-house interaction because that’s where the interest lies, but a Hufflepuff who wanted to avoid bullies of other houses could likely do so at least 90% of the time.
And as well as the reduction of social abuse via the reduced time spent with jackasses it can be a whole lot easier to tolerate social aggression if it comes from outside what you identify as the most local social hierarchy. If a Hufflepuff is insulted by Draco it may be a minor nuisance but if it was a high status Hufflepuff like Neville bullying them it would probably seriously damage their mental health over time.
They can go to their own Houses, and do not have all of their classes together. The canon books, and MoR, spend considerable time focusing on inter-house interaction because that’s where the interest lies, but a Hufflepuff who wanted to avoid bullies of other houses could likely do so at least 90% of the time.
And as well as the reduction of social abuse via the reduced time spent with jackasses it can be a whole lot easier to tolerate social aggression if it comes from outside what you identify as the most local social hierarchy. If a Hufflepuff is insulted by Draco it may be a minor nuisance but if it was a high status Hufflepuff like Neville bullying them it would probably seriously damage their mental health over time.