Two things: first, you followed horrid Web advice to put your LUTs where you did, and second, you haven't explained how your're determining that that color is being applied wrong ... which will lead to an answer for that also.
DO NOT EVER put your own/acquired LUTs into the Package files or Program folder for Premiere Pro, AfterEffects, and MediaEncoder. Period ... that folder tree is referenced ONLY by the particular app, and ... in order of appearance in the list, NOT by name of the LUT/Look applied. Change how many things are in there, Pr will suddenly used different LUTs/Looks for every project you've already worked.
There are two specific places provided for you to place LUTs/Looks to be used across all three apps, use those! Here's the location chart ...

NOTE: when you initially navigate to say .../Library/Application Support/Adobe/Common/LUTs ... there will not be any folders there. YOU create the folders, then add your LUTs/Looks as you wish. Technical folder LUTs/Looks will show up in the Basic tab, Creative folder LUTs/Looks in the Creative tab list.
In both cases, in computer-speak alpha-numeric order. So ... add an A or a 1 to the front of your LUTs/Looks, they show up first.
Next ... are you viewing the exports say in QuickTime on a Mac with a P3 monitor? Well ... you're looking at video sRGB/Rec.709 content on an OS and monitor set for a very, very different color space. Oh ... and you did your corrections with Pr trying to show a proper video sRGB/Rec.709 image in the Program monitor which as your computer is NOT set up for pro video production ... wasn't as accurate as it could be.
So ... if the above is the case, go into your OS settings for monitor, other users have posted that there is an option for sRGB and Rec.709 there ... set your system to that. Also, there is a preferences in the Playback tab for "enable color display management" that helps on some Macs.
Next ... color management is something the user has to provide, as systems do NOT ... and vary widely. Such things as ...
- Safari and Chrome browsers are color-stuuuuupid. They don't pay any attention to the color flags/tags of images/media they show.
- Firefox is the only color-aware browser.
- QuickTime player is if anything more color-stuuuuuupid than Safari and Chrome.
- Potplayer and VLC are both free downloads and attempt to handle color within the media tags/flags and system settings.
And understand that even in the "tightly controlled" broadcast system, for all the massive QC effort put into everything that is allowed on the system for b-cast and the system controls ... every freaking TV/screen out there does something radically different to the image than was "intended". As one colorist puts it, "You can't fix gramma's green TV."
Even for web use, people will watch your material over devices with radically different screen/color settings, brightness settings, and viewing environments. On every screen, and even as they walk inside or outside, the perception of the image will change dramatically, and again ... none of them will be like you 'intended'.
No pro colorist prepping for major network broadcast has any more control of the image on the viewer's screen than you. So what do they do? Set up a carefully controlled working gear/environment to get controlled results. Prep to the standard asked for in the Deliverables ... deliver ... and move on with Life. It's all you can do.
Neil