DISCLAIMER Any resemblance of these fictional characters to any real persons is NOT intended. This is purely a hypothetical for the sake of discussion.
My answer is: Yes.
Let's take an extreme example. Imagine you have a priest who is running a de-facto cult, with a firm control over the operations of most families attending, he demands to turn over most money to the "group", and the leader and/or several officials in the group are involved with pedophilia. Let's say they use various brainwashing techniques as well. But let's also say the priest(s) in the group are validly ordained, and you have no other Mass within 200 miles. What do you do? Long story short, there are valid reasons to stay home from Mass on Sunday. Some people just don't have options for a Tridentine Mass in their area, or a decent Tridentine Mass. It happens. When you stay home for the RIGHT reasons, God WILL take care of you.
When your "valid Mass" comes with a certain threshold of risk, of baggage, of evil -- it's time to re-evaluate whether you should attend.
The graces from a valid Mass aren't going to MAGICALLY restore virginity and innocence to your children, restore money to your bank accounts, undo psychological damage, restore jobs that you gave up to move across the country, restore your trust in priests, or reverse long-term damage done to your Faith, and that of your family and children. It also won't bring back vocations that were lost due to the circuмstances (individual evils) surrounding the chapel.