Just a question about save files

If I edit a save file when I inject the new savefile will it wipe my dlc? My plan is to do a factory reset save file so i get rank 20 surv and killer and then make another save file with all addons and perks again just so that I can face the easier survivors and killers cause I am an asshole?

Or even easier does leaving games lower the rank you play against?

If you want to derank use just SAM, i think its still save to use it. and yes leaving a match lowers your rank, but I think its a bit rude to do that