Dude it appears to me that you either were never in a kindergarten or never interacted much with children so let me tell you something
For your whole kindness stick you seem to completely ignore the cruelty after how it's incredibly easy to take joy in pick on those who are different. Say like a one armed mon?
SInce the earliest days of my childhood I had a food allergy, which meant that sometimes I got different food then everybody else during lunch, of course some children took offence to the fact that from their PoV I got the preferential treatment, thus they tried to bully me, exculde me from games, etc. you proabably get it
Was it bad, of course, nobody likes to be excluded
At same time however I had children who just wanted to play with me or wanted to be my friends despite the supposed preferential treatment,
Or those who simple saw a kid they wanted to play with during a particular game
Children are simple and thoughtless like that, which is what makes able to be kind and cruel at the same time
What I'm trying to say here is: that what you say is definitly possible, but that at the same time the oppsite is also possible and that you will hardly find a more controlled and secure setting for things like that in the digiworld, then a daycare run by a kind digimon in a secure town and currently the only thing that stands in the way to Sparks making friends is our terrifying presence
Also what happens if he makes friends with the wrong crowd and influence him to become even worse?
I honestly don't think here is something like a 'wrong crowd',
1. because they are to young for that
and
2. Because I doubt Frigimon would tolerate stuff like that
Also making alot of assumptions huh? Why would any of the Rookies want tobe his friend in the first place? The new Strange Mon who laugh at others misery. Figimon is just one mon and has no possible way to make sure he's all right nor has a reason to look out for one specific mon.
because thats what children do, they simple make friends
Also he only laughed at Beat who isn't particular well liked and his type of character should get well along with Dracmon who enjoys pranks
Also Frigimon has all the means and reasons to look out for Sparks and Verge, simple because Frigimon is an caretaker and is as thus dedicated towards the well being of all those under her wing, espcially those 'poor cuties who lost all their friends and had a horrible time' like Sparks and Verge
In fact you can expect Frigimon to mother them for quite some time, especially Verge who also has a death sentence hanging over him, unless we convince her that we are in fact quite mature enough to handle our situations ourself