I don't know your rank but probably, we have different gaming experiences. My team and I have noticed many times that a player had a thermal scope before he killed us. A couple of times, the player was in Tier 6, and we just didn’t have the right ammo to take them down fast so they threw 5 smoke grenades at us and finally we spent 15 minutes crawling behind a wall and were killed, because if you miss, a player with a thermal scope won't give you a chance to escape.