How can I fix my Instagram and other apps without hard resetting or taking it to the apple store?

So earlier this month I updated my Iphone 6s plus to the new update that allows you to facetime with a multiple number of people. During the update, My Wi-Fi went down, and it took a lot of time until it finished, and when i started my social media apps, it would freeze and crash. Many other apps had similar effects and my other apps would process a lot slower. Is there another way that I can fix this without hard resetting or taking it to the apple store? Btw I had already tried to soft reset and it barely does anything

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