In most cases, it tends to be the equivalent to cutting out pieces of other people's work and pasting it into a scene.

As far as I know that's called a "collage" (at least in dutch it is, couldn't find an english word for it)  and is an artform.
It seems to me that these discussions seems to come back over and over again, like thromarcadia mentioned "beating a dead horse".
Many, many years ago i studied architecture, and I discovered that the only way to get the best results was to convince the teachers that your work was good. That seems reasonabe but a few less talented people did that by pissing off the work of other students. And in the end it were not the most talented students that succeeded but the ones with the biggest mouth, and the worst thing was, they were encouraged to do so: because in the real world you have to defend your work to your client to be succesfull. I don't think I have to mention that I dropped out early, because I was a rather shy man.
Some weeks I spoke with a girlfriend, who studied some years on the art academy of the Hague, but also stopped because she couldn't take the very competitive climate there. And by the stories I've heared from other friends, things haven't changed a bit, it's only grown worse.
So in my opinion people who are burning down the work of others only do that because they have learned to do so or they have very limited skills.
My advice: don't get upset by any comments on your work.

Regards,

Bopperthijs

-How can you improve things when you don't make mistakes?