If you're on the TikTok home page, press the "Me" button from the Left-Bottom of your device screen. Now you'll see an account page showing your all videos, and stats like your number of followers.
Now, press the "Menu" button(showing in form of three vertical dots) from the Top-Left of the device screen. It'll show you a menu as 'Settings and privacy'. Now Select, "Manage my account" from here.
you'll get seven different options now here, But if you look at the bottom, you'll see the "Delete account" button(i know it's not prominent but exist), Select it.
To delete your Account you'll just need to verify your account, using your Google or Facebook Linked account (depending on your TikTok profile which are you using). Now, Once again select the "Delete Account" option, and in the pop-up window that appears, again select "Delete".
It's Done! Now you aren't logged in on your account, So people won't be able to see your videos or likes Now. But if you want to get back to your deleted TikTok account you actually can, as long as you follow the prompts to reactivate it first
(it's possible).