Here is a Youtube clip of compiled evidence I found to suggest Grandpa is using vision assistance. PLEASE SEE ANNOTATIONS IN VIDEO COMMENT OF WHY I BELIEVE THE EVIDENCE IS DAMNING.
the acc I banned and got all evidence from - https://steamcommunity.com/profiles/76561198878514458/
alt acc - https://steamcommunity.com/profiles/76561198978096941
Main acc - https://steamcommunity.com/profiles/76561198109672571/
Faceit acc linked with the banned acc - https://www.faceit.com/en/players/Nizzla (note creation date)
Grandpa went 2.5k/d in first ever match (i theorise without anti cheat) then game aasked him to use anti cheat and in most recent game he had a k/d of 0.25, he is lvl 3, we all have bad days but the player i saw, if not walling is much better than a 0.25 k/d in lvl 3 faceit pug.
Steam acc is fairly new (one year) with low hours (131) and while grandpa is raanked around 100 in 1v1 kzg and he states he is well known as a player people were not surprised when i banned him and grandpa is clearly closet walling and deliberately trying to hide cheats which is why he is not "rank 1 in 2 days" and nobody knows him to be good, they just know that he has lots of kills. for skill or for cheating who knows....
gl with the appeal Grandpa