No previous/next page button on my theme

Hi,
I don’t seem to have any access to older blog posts on my website due to my theme. Here’s my website: Whatreallyscaresyou.com

I’ve read similar posts but their solutions didn’t work. Thanks.

Here’s my Main Index code:

[code moderated - the forum limit for posting code is 10 lines; please use the pastebin]

https://pastebin.com/fN2cgxtb