Your list is a bit confusing. Stax is about breaking parity with your opponents, so typically a stax deck will have a
game plan that's either mostly or completely unaffected by its own stax. You have multiple cards that shut down aspects of your
game plan.
Two examples are
Solemnity and
Gaddock Teeg. Your entire strategy revolves around giving your creatures +1/+1 counters.
Solemnity is a silver bullet against your deck, but your opponents don't even need to run it because you already are. Same with
Gaddock Teeg. You have several noncreature spells at cmc 4 or higher, including ramp, stax, recursion, and wipes.
You should narrow your stax to effects that don't
hinder you, or at least
hinder you less, and maybe change your strategy to something more conducive to a stax deck. Big Stompy is not a typical stax strategy. They usually go more for combos or hard locks into incremental damage.