Not saying its a 1:1 alternative, but I used darktable a few times to do this and for post processing.

I am definitely not a photographer or graphics expert by any means, but I used it on recommendation of someone who is and was also complaining about Adobe lol.

I really don’t know if it lacks anything compared to lightroom, but all the fancy switches and bars and stuff looked pretty cool and too advanced for me to understand,

Lol i’m pretty sure SFTP, SCP, and rsync are pretty much all the same when it comes to speed. I’ve used all three very frequently, and by both bitrate and total time, only rsync or scp very rarely edges out for single small files.