All the full download options are not available right now due to recently updating (and having to add a file that was missed in the ZIPs that I started uploading yesterday, so had to restart today). The Google Drive link was gone because I had to remove the old upload to make space for the updated one. It is back now, and hopefully the ModDB mirror will be ready soon as well.
The MEGA download is specifically there because people requested it before (crappy Internet I guess). It's not the primary download and has never been intended as such. The majority of servers have already updated as they only needed the changed files.
Also you have no need to manually download anything if you already have the game installed via launcher. There is no such thing as "server files". Assets are the same. You also could have used the command line installer / updater to download files directly to the server (saving you time having to upload).
TL;DR not all the download options are there but that's a temporary situation, you had other means of setting up a server, no reason to freak out or say the situation is "ridiculous". Suggesting use of Dropbox is rather ridiculous though given the cost of their storage, and Mediafire was ad infested last I checked.