Too Many Cells Clogging the Backend of my Site?

So, I’m using Site Origin Page Builder, which I generally love. Lately, however, when adding new pages, which tend to be photo-heavy, the page builder and admin panel becomes extreeeeeeeemely slow. Like, when I upload a picture into a cell, it takes more than a minute to confirm that it’s added, and sometimes the page just crashes without loading. It’s a huge problem, because it’s taking me about 1/2 an hour to upload just a segment of photos and their descriptions on a page. ??

I am frustrated, because the structure of my site isn’t conducive to galleries. I need to be able to add or subtract any picture and description I want, at any time, without messing up the layout of the entire page. I thought putting individual pictures and their descriptions in individual cells would work, and it does, but it’s unbearably slow. The front end of the site loads beautifully, so I don’t understand what the problem is. Is there just a limit to how many cells I can reasonably have?

This is a product site, and I really need to get through this roadblock so that I can take it live. Any and all suggestions welcome. Is it unreasonable to think that I can have a bunch of pictures in their own cells? ?? If it is, what can I do instead?