I think ppl say this is bad mostly because it seems like the history is desperately trying to make the new guy likable:
"see this new guy? he has backstory"
"look look look, he has feelings too"
"now look a this internal conflict, ma boi is top notch character development"
And the amount of info being dumped at once doesnt help either.
He only apeared 7 chapters ago, and yet this guy is getting the plot to advance his character, instead of being a character to advance the plot. The weird thing is how they decided to make a full character arc in the middle of "lost tina arc". Because, if your MC is in danger, why should the viewer invest himself in the unrelated backstory of new char that may-or-may-not be relevant in the future? His past has no narrative purpose to this arc. Is this Tina arc or New guy arc? If is New guy arc, why not make a solo thing, instead of shifting focus every 5 pages?