You're up against one of the most refined control machines that Magic has ever developed
Artifact lands tapped for two in affinity decks, Equipment offered way too much power for the resilience they came with, and modular was a surprisingly linear deck with explosive endpoints
In the case of Thanos, the Mad Titan, you can pay WUBRG to gain two +1/+1 counters before destroying all other creatures with an odd or even mana value, a decision you declare when activating the ability
The big limitation is the lack of other Kavu, but Possibility Technician seems borderline playable as your only Kavu (along with a Soulstone Sancturary or two to late game be able to play any exiled cards)
Mahadi, Emporium Master can create a treasure token on each of your end steps if a creature has died that turn
This time, I think they may have just completely blown the lid off the formula for Commander precons