It sucks to gatekeep someone out because of their hardware but in life that's usually the reality. You can't play golf without a decent set of clubs and balls, you can't play Call of Duty without a newer graphics card, and you can't win an online game without decent wifi. Whether it's cheating or genuinely bad internet, it gets to a point where you gotta make a call on how competitive and how fair you want to be vs how casual and friendly you want to be.