OK, I didn’t get what you were trying to do.
Why not have two groups:
Deal Owner is Me AND
Stage → Is final: True
OR
Deal Owner is Me AND
Stage → Is final: False
?
And have both groups as pinned filters.
You can then switch between showing
- all deals you own (both filters active)
- only Final deals you own (first filter group active)
- only non-Final deals you own (second filter group active)
- all deals (neither filter active)