BKGaming: Any downloader will have failed downloads if you downloading a lot of stuff at one time. Even if one was to use their browser and a download manager this is bound to happen. I regularly get failed downloads using FireFox & DownThemAll.
Galaxy is not unique in this issue at all.
The thing is though, that if you tell Galaxy to download 100 things, it doesn't download them in parallel but rather in series so it makes no difference if you tell it to download 1 thing or 500 as it downloads them all one at a time. Any requested downloads greater than one are queued and sit there doing nothing until the current download completes. If someone experiences a download problem it shouldn't have anything to do with whether they told it to download one thing or a multitude of things. Any download failures I've ever encountered with Galaxy to date have been due to running out of disk space on my end, or a GOG server error due to the file actually not existing on their end (reported and Judas usually fixes within 24-72 hours or so), or other GOG server related issues. Again, it should have nothing at all to do with having told it to download many things as it does not download multiple things simultaneously which is confirmed by holding the Download view open with the mouse with multiple things queued and seeing that only one is being downloaded at a time.
BKGaming: And use browser downloads = might also not work. This could be an issue with his connection and packet loss when downloading from GOG or some other issues with his ISP reaching GOG's servers. This could be user error.. or it could be Galaxy. To many what if's to blame Galaxy or anything else.
Depending on download speed and size it sure can. Also OP is clearly downloading multiple games at one time, as far as we know he could be downloading 10 or more games overnight.
I agree the problem could be unrelated to Galaxy itself, but have to again say that Galaxy doesn't download multiple things at a time no matter how many things you tell it to download, it just queues them up.