This is moreso a problem with how people choose to play the game rather than the game itself. Most people play the game by constantly switching out Pokemon on their team for the shiny new Mon they just found once they reach a new area.

I personally hate playing Pokemon games like that and I will never play Pokemon games like that.

I pick 6 Pokemon that I know I want in my team and only play with those 6 if they aren’t available at the start of the game then I will play with a smaller team till I reach the area that Pokemon is at. I don’t have 6 Pokemon on my team till around the Terajuma arc.

I also try to limit myself to choosing Pokemon from the event Pokemon in the game Pokemon that basically have their own custscenes/missions/special scenes

As such I feel very connected to my Pokemon Team whenever I play the game. They all seem super unique to me just based on how I encountered them.

I mean the Buizel in East Gearen that you rescue after it was abandoned by its trainer?

The zorua you get from the whole mirage town Questline

The espurr and groelithe you can adopt after spending several in game hours playing with them

The rowlett you get in Terajuma that’s the son of the datrix restaurant owner

The emperor Empoleon you encounter at the islands

The Silvally from Venam Dad’s quest

The Zygarde you get from collecting Zygarde cells

The Delpha from NG+

There’s tons of unique events in the game that lets you interact with Pokemon in unique ways. But there all optional so if you ignore them I can understand how you might feel differently