I call it RFH (Rush, Flash, Hit)
It’s a lot harder nowadays thanks to the ads(aim down sights) nerf that all shields got. Top that with the fact that blitz players are usually running.. which in return increase the time to aim down sights. Not to mention the blind spam nerf. Point in turn is be aggressive yet take your time. Close the gap, get in close. Don’t be afraid to hip fire to provoke them if needed If they round a corner, wide swing it or flash it the second you turn Some situations however is best to take your time. As a blitz you instill fear on those before you. Use this to apply pressure to let your team flank. You’re not alone out there. Best of luck, hope this helps!