Sorry, I just don't see it like that.
For me it's something like this (some are personal interpretations, some are probable things, some are proven things, make what you will from it).
Leaving aside tabloid stuff like media leaked stories and whatnot, board fucked up in some areas big time.
Their biggest mistakes:
1 - bad transfers with no real plan, blowing up a huge amount of money.
2 - supporting the amigos while their influence in the team got to unhealthy levels.
But the amigos were surely not unhappy with 2). Them getting the best deals possible from this board, even though they were clearly declined stars who were far from performing according to their rank as highest paid players in the world. No. Surely not. Surely them getting the biggest salaries in world football while being past it and becoming European embarrassments every year wasn't something they complained about. What could they have said? This board is absolutely shameful, they're giving us way too much money?
In 2019, when Barca was managed by the Amigos' favorite Ernesto Valverde, everything was fine according to the veterans. The players even said they are to blame after the Liverpool fiasco. Certainly not the manager. Nothing about the board as well. All was well, and veterans took the blame on them.
Then Valverde was sacked, 6 months later, and complains started to happen. Obviously, they didn't sanction the sacking of Valverde, they loved the guy. Messi publicly signaled out Abidal, who said some of the players complained about the trainings intensity, as one of the reasons Valverde was dismissed. Rumors even said De Jong had to work extra to keep in shape with his personal trainer and whatnot, due to trainings not being serious (Spalletti joked as well about our match prep, and even Malcom said in Russia the trainings at Barca under EV were very soft). Messi went out publicly and blamed the board then, and directly Abidal. But for what? Basically it was for sacking Valverde.
Setien started to implement some changes, but he was weak. The squad, and veterans in particularly had other plans. At this time, we see more news appearing about dissent between the veterans and Setien. Then we hear about Bartomeu stepping in and having a meeting with Setien to mend things over. At that time we see an interview by Bartomeu, where he speaks about the manager "talking with the main players of the locker-room and together making the best decisions". Some bullshit like that. We can only guess what the meeting was about, because from then on, veterans had full lower, and Setien and his staff took a relaxed approach, a la Valverde. Then the disaster in CL happens, and suddenly Bartomeu does a 180 degrees U-Turn on the veterans. The same veterans he protected all this time. The same veterans he rewarded with insanely expensive and long contracts, putting this club in financial trouble (along with his failed transfers).
And he names Koeman, and does the one thing he didn't do before. Grows a pair. Gives him power over anyone, including the veteran core. Including Messi. And Koeman starts to make clear changes. Veterans get dropped, including huge names like Suarez. Messi has a meeting with Koeman, and news report that Koeman said no more privileges for certain veteran players (obviously, Messi, Suarez, Pique etc.).
And now what do we see, Messi threatens to leave.