someone had shared screencaps to show they did get multiple mirrors in a row: i don’t doubt that it can happen. When i’ve had mirror games, they’re usually close together.
Some of the ones that complain about leavers are leavers themselves playing in leaver queue and “must” play out the game because they left their regular aram games and get stuck with a mirror in leavers where players leave games.
The one with “bots” in it may have had actual “bots” since aram is a mode that will fill if someone is in queue long enough.
The tales told aren’t completely “trust me bro” but there usually is unspoken context that influences why they’re having particular problems. If someone plays out a game, they’re only in queue once in 15 - 20 minutes; when people leave games, they can have “dozens” of aram games in a matter of moments and thus be more likely to have mirror matches.
Lotta people fixate on the game being “ded” so they think only a handful of matches are being made instead of flipping the math and figuring out the frequency of mirrors would indicate a higher amount of games played than they consider.