Mods keep reappearing after deleting them

@stephaniem1996  If you'd like help with the lag, please test a new save in a clean user folder.  This doesn't mean you need to abandon your existing saves, only that it's worth narrowing down the source of the issue.  Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop; if it copies instead of moving, or you get an error when trying to move it, stop here and let me know.

Otherwise, when you launch the game, if it launches, a clean folder will spawn with no content.  (Your saves and other content will be intact in the folder you moved but temporarily not read by the game.)  Don't add anything to the new folder yet; just start a new save and let me know how it runs.

Please also run a dxdiag and attach it to a post.

https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/