Problems uploading photos to Facebook from camera roll (iPhone)?

I'm trying to upload photos from my camera roll on my iPhone 6SE to Facebook on the Facebook app. I made the mistake of thinking I could upload them all at once (about 30 in total with a couple short videos sprinkled in) but of course my phone couldn t handle it. As soon as I selected the photos from my camera roll and tapped "done" to bring me to the next screen for uploading, it greyed out, indicating I selected it, but remained greyed out and didn't move to the next screen. It was apparently uploading my photos indefinitely (spoiler: it wasn't doing anything). I tried tapping "cancel" but the screen was completely frozen. Had to hard restart my phone. Now frustrated, I attempted the same thing but only selecting about 5 photos (and no videos) and it did the same thing. Luckily this time I could get out of Facebook and close out the app and try again. Tried about three times and it just never was able to push through to the uploading screen, save for one attempt, when it did manage to make it to upload preview before ultimately freezing when I tried to tap "post photos". Just seems ridiculous that an app designed specifically for photos is completely useless in actually uploading photos. Anyone have a fix to this? I'm about 2 seconds away from just deleting the app altogether because it's practically useless if this function doesn't work.

Added (1). Edit: I have managed to be able to upload 2-3 photos at a time, but this is extremely inefficient and there must be a better way. I would also like to add that I just tried uploading a video, by itself, (10 seconds long) to the album but it froze halfway through. I didn't see any way to cancel the upload midway through (it was clear to me that it's never going to go through) and the only advice was to delete the app completely and redownload it. Am I missing something?