80% of the priests left are probably good-willed, and still provide the sacraments. But...the leadership can't be trusted.
Without God's intervention, the new-sspx will be part of new-rome in 1-2 years. It's over. Their only positive value is valid priests/sacraments, which...once a deal is reached, will end, because new-rite/fake bishops will take over.
It's not just a question of good will, something only God can judge. The issue is that they've changed their priestly formation process starting in 2003. So eventually, every SSPX chapel will have a "new style" priest heading things up. And you'll have to take my word for it, as an ex-seminarian, that they have changed the formation pretty substantially.
Including acts of obedience and submission to the local bishop, a huge emphasis on "obedience" especially to Rome and the SSPX superiors, and the "3 Ds". See my post on this topic.
The testimony I received, in person, from C.T. who left the seminary in 2000 and came back in 2006 (3 years into the changes), was extremely eye-opening. He's the one who told me about the "3 D's".
I wish he was more online -- but he's a bit older than me, and NOT a tech bro like so many of us Trads. I don't even know if he does e-mail.