Previous post was deleted by the "moderator" for no reasonable logical explanation. The animation is uploaded in the original compressed resolution provided by the artist, as it weighs 187 Mb in full.

Time to break this down.

Janitor, not moderator. Janitors deal with posts, moderators deal with users.
Deletions are always based around uploading guidelines and reasoning is always given in deletion reason, deletion for post #5291332 was provided being compression, which is listed in guidelines that all uploads need to be of high quality.

Filesize has nothing to do with quality directly. Usually higher filesize can mean higher quality, but especially with some 90's fileformats like GIF, this isn't always the case as it's more to do with how optimized the file can be done to remove as much data losslessly as possible.
With GIF animation this usually means that stuff that doesn't move, should stay identical between frames, so they can just be transparent, however if you watch e.g. the sofa in this animation, even though it's static and doesn't move, the pixels are constantly shifting, meaning even this GIF is straight up badly made and bloated, it could be even higher quality and would turn out 1MB, not 10MB. There's many examples of even higher quality and resolution animations on this very site being much smaller size.
If artist gave you original PNG image sequence or frames, they could indeed turn out hundreds of megabytes, but as that is lossless source material, turning that into great quality any other format is possible and usually relatively easy. Even APNG of this could most likely be original resolution and be only couple megabytes.
Also if the artist gave the GIF that's on FA to you, they have no idea what they are doing and need to fix their workflow, settings and/or software before continuing.