How to hide a compound piece of content with crite

问题:

I have a set of pieces of content, each organized exactly like this:

<grandgrandparent>
    <parent1>
        <key>
        </key>
    </parent1>

    <grandparent>
        <parent2>
            <key>
                <child>
                    <key>
                        <grandchild>
                            <grandgrandchild1>
                            </grandgrandchild1>
                            <grandgrandchild2>
                                KEY
                            </grandgrandchild2>
                        </grandchild>
                    </key>
                </child>
            </key>
        <parent2>
    <grandparent>
<grandgrandparent>

How can I hide the entire grandgrandparent or at least the largest sub-part of it--but only for those grandgrandparents where the key value (or string) are matched to some criteria?

The key difficulty is that Safari still doesn't support :has(). It's even unclear what Level 4 constructs are actually supported for Safari Content Blockers.

And removing only the deepest elements directly matching the criteria still keeps a major part of content that needs to be removed.