I've raided for a long time now and every tier I had to deal with Savage PF (once it became cross-world). Let me tell you that while there are sometimes one or two people who are utterly irredeemable and your best bet is to leave immediately, by far the majority of PFs I've been in wipe to mistakes distributed more or less equally among the players, sometimes including me.
What PF needs isn't skill or more awareness. It's patience. Leaving and tilting after two wipes at two different places due to different players is only going to make the problem worse. In my experience the most successful PFs are the ones that are patient with no obvious weak links.
The reason why PF rewards patience is twofold: first, everyone has a "personality" in terms of how they move, what their preferred spots are, or even down to things like when they decide to greed a cast and run in to solve a mechanic. Every time you disband you gotta learn these quirks all over again. While they might not be too pertinent in Savage, in Ultimates it is a real thing. In Savage, some main tanks prefer to grab tether in Phoinix to the north. Some prefer grabbing it towards northwest. Some melees prefer going into the center of the boss during Ashplume + Firestorms. Some BLMs prefer sitting in their Ley Lines until the last second for the first Aetherial Shackles which can sometimes scare people into overadjusting. All these little things can cause wipes if players are not sufficiently aware to adjust for these little behavioral quirks, which you should honestly not expect in PF.
Second, impatience, especially if you express it in party chat, just causes tilt and makes people lose focus. It should be obvious why this is a problem.
The reason why I dodge PF and mostly raid with my static is not actually primarily due to their skill level. I think most people in PF play reasonably well for the encounter. It's actually mostly due to the impatience. People leave after two wipes, or start fighting with a single death, or start tilting and make all kinds of mistakes. Raiding isn't just a skill check, it's also a mental check. Being able to keep your cool, be patient, and have enough awareness of different people's personalities to adjust for them is an important skill that PF doesn't have. I spent 4 hours today reclearing P3S and it could've been done in 1 if people didn't just leave after one or two pulls. The impatience is the real reason why PF is bad.
Also, as an addendum, the fact that NA PF is often so impatient that they don't even want to briefly discuss Ashplume spread spots before the pull, and end up wiping to Ashplume spread 8 mins into the encounter is just stupid. People really need to be patient to spend literally just one minute talking about spread spots.
And, I don't want to generalize but in my experience the ones who are the most impatient are typically the ones whose raider profile on a certain website doesn't paint them in a very positive light.