Hacked website redirect, only on desktop, help with restoring it [closed]

Have you tried clicking Wordfence’s button, ‘Repair all Repairable Files’? It may be able to replace all the plugin and WP core files with the correct repository versions.

You are right that if you back up, wipe the site, and reload the backup, you’re not accomplishing anything. That said, you need some kind of backup, so I would do it first. Then you need access to the cPanel or such and see if there was some daily automatic backup going on. If so you can go back in time until you get before the hack.

I find it helpful to download a backup of the home directory onto my local computer. Then I use BBedit’ multifile search to search for phrases throughout the site. For example, you could search for parts of the URLs your site is being redirected to.

Contacting hosting support for assistance would be another good move. They may be motivated to help rid their servers of the hack.

The .htaccess file looks fine. You can erase everything up to “# Begin WordPress” line, as everything before that is just repeating.

Wordfence has a list of steps to follow in fixing a hacked site. I suggest you follow it closely.
https://www.wordfence.com/docs/how-to-clean-a-hacked-wordpress-site-using-wordfence/