The technical aspects of the games shows just how little effort was put into this compilation. Super Mario 64 could run on a toaster at this point, but they didn't even get it to 1080P or 60 FPS. Sunshine is also stuck at 30 FPS. But Galaxy, which is the most technically demanding game of the bunch, is running at 1080P and 60 FPS just because it ran at 60 on original hardware. If the Switch can handle Galaxy at 60 FPS the other 2 should be no problem. They just didn't care to do it.
Imagine if the Halo collection had Halo 4 running at full HD and 60 FPS, but Halo 3 ran at 30 FPS, and Halo 1 ran at 30 FPS and just 720P. You'd rightly wonder why the less demanding the game, the worse it runs.