I think you guys are insane to think the last album is bad
Invincible (tale of growing old), and Descending (the tale of our humanity's global crisis and necessity to unite to overcome our ending, strangely prophetical concerning our current situation) are masterpieces imo. I just personally didn't enjoy much the fear inoculum song, but I still appreciate the amazing work that went behind creating such songs.
Did you listen to it tripping?
As for the other albums, I like so many, and I love to see how they evolved over time, starting with a lot of anger, and sublimating their energy and becoming more spiritual/balanced.
Some of my fav songs from them, in no order:
Right in two
Schism
The Grudge
The Pot
wings for marie 1 and 2
Lateralus
Reflection
Jambi
Aenima
The Patient
46&2
Sober
Prison Sex
Undertow
Opiate
Sometimes I watch people reaction channels and some of the first reactions to Tool are cool, see them get taken on a journey and have their mind blown by all the crazy time signatures and depth of the songs.