When we disbanded after stopping mythic raiding, jumped on our friends and family server and started pugging normal / heroic, we found an interesting issue - modern gearing paths allowed people to meet or sometimes even exceed heroic gear levels without EVER having stepped into a raid. As anyone who raids understands, raiding and M+ / PvP are completely different skill sets and an entirely different experience. As such when you throw a virgin raider into the mix, the results can be pretty godamn terrible. This was our most common outcome - 50/50. Invite 4 pugs with appropriate gear, 2 will perform as expected, 2 will be below the tanks and healers in dps on boss fights and die 15% in every attempt.
Im aware there are tools like Rio at the time to help with this, but we thought "its only normal" or "its only heroic" and boy were we wrong.
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That is called a strawman - no one here has claimed to have killed mythic jailer, so why even bring that up? Although you have made more than one claim about how good you are....