Reminder that in TFT, losing is defined as 5th to 8th not 2nd to 8th
That being said, losing to RNG is rather uncommon and solely due to your choices. Many of you can't play games without being handheld through every decision just like in SR and hence are unable to "win" most of your matches.
Use what you are given and make the MOST of it instead of praying to receive specific items and champions to copy your "guides"