And how many in those multiple groups were first-timers still figuring things out in those few opportunities before the group disbanded? You think people were spamming the trial in DF after clearing it? If you're doing the trial via Duty Finder on the first day, not even the first night... most players you're encountering have not cleared, are new to the fight, and need some time to learn mechanics. I am not underestimating the community's understanding of cannons. I am underestimating your ability to understand how day one Duty Finder works.
No, flipping, duh Stalkhawk. How dumb do you think I am!?
No, I fully expected any group to need a few runs to figure things out. However, what added to my frustration, is that several times I'd be in groups that seemed to be, "starting," to get it, getting the boss to under 20% HP, only for two people to decide to vote abandon. This even happened on a run where the boss was down to 1%, so another run would have almost certainly been a clear. But, nope, somebody got impatient, and I was stuck DFing for another hour as a flipping result. This only made it even more of an exercise in pure aggravation!
So, yeah, so sue me for wanting the developers to avoid throwing in cannon mechanics again. Frankly, they're boring even when people are doing them right. When people aren't, they consistently create the most aggravating situations I've ever encountered in this game. These mechanics are bad, and you should feel bad!