If you're using multiple image uploads on Instagram, perhaps you could be using it more effectively with seamless carousel collages.
Instagram's carousel feature means you can upload multiple images to one post. There has been a lot of speculation about how useful this is in terms of interactions, but the general consensus is that it's better than a single image. One technique you may have already seen is people uploading one long panoramic image, for instance, but swiping across it just scrolls sideways through one image without any breaks. In this video by Cody Blue, he teaches you how he makes his collages for Instagram, utilizing this seamless carousel technique.
I'm not a huge fan of collages personally, but this method can be used just as well on one or several images to achieve a smooth and interesting viewing experience. I hadn't thought to use the slice tool and guidelines to chop up images for Instagram, but it does seem a much quicker and easier way to get a great result.