My friend @riir52520747 made a Argument against The Trinity, Here goes:

P1) God is triune. (Assumption for Reductio)
P2) The Son, The Father, and Holy Spirit are not identical to each other. (From, "Trinity")
P3) The Son, The Father, The Holy Spirit are each God (From, Trinity)

P4) Only The Son has the essential property of being identical to the "Son." (From the definition of "Essential Property", and Haecceity.)
P5) Only The Father has the essential property of being Identical to the Father.

P6) Only the Holy Spirit has the essential property of being identical to the Holy Spirit.
C1) Therefore, each member of the trinity are identical in quiddity, but still differs haeccetistically. (From 3, 4, 5, 6.)

C2) Therefore, each member of the trinity is essentially non-identical. (From, "Haecceity")
C3) Therefore, there are 3 distinct entities which each have the property of "Being God"
C4) Therefore, There are 3 Gods.
C5) The Trinity affirms there is only one God.

C6) Therefore, the Trinity is contradictory.
C7) Therefore, God cannot be triune.

Justification for 4, 5 and 6: