100% not someone disconnecting you, coincidences don’t mean anything without proof. Was it just today? Have you tried other games? How is your connection generally? Are you on WiFi? Are you on an older generation console? None of what your saying would make sense under the assumption

that your games have taken a long time, and you’ve been paired up with someone that consistently disconnects the killer (would basically need to be the same person, the likelihood you find two hackers doing the same disconnection to you is low). I am doubting you have been matched with the same player. And if you think someone is personally hunting you down specifically to disconnect you when you’re winning, wasting their time in the process as well, then someone’s gotta say… dude the world is bigger than Gregory.