Did you replace any front end parts? Sounds like a severe toe in / toe out situation. If you replace a tie rod, even if you count the threads, the alignment is off due to manufacturing differences. Time for alignment most likely
I had inside tire wear on my Equinox when I bought it. I found a loose ball joint. It was not severe and It did not shimmy or shake. Don't know what you mean by "sliced". More information will get more results from the community. Any repairs done? Did you check any suspension parts?
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