Nesting flattens images

[Confused User]

I have a really simple problem that I hope you can help me with.

In my video, I've set many images to a smaller scale, and these clips have been placed over a background. I then nested both the image and the background, and adjusted the scale of the nested seqence so the the image appeared to be back at it's original size.

HOWEVER!

It seems like nesting flattens the clips, because when I zoom back in the image quality has noticably dropped. I've attached photos.

So my question is, is there a way I can nest clips without flattening the image quality, and if not, is there a way I can apply motion effects to many different clips at the same time (as a substitute) without losing quality?

I've already created a wide plethora of motion keyframes to my nested sequence, and with the different clips being different scales, I am not sure that I could replicate it for each clip individually.

I'm quite new to Premiere Pro. Can someone please help?

[name is already taken]

Im not sure but look into set to frame size vs scale to frame size im not sure if its what you are looking for but it is an important part of how p pro handles resolution and scaling.