As already stated in another post your questions are a poor attempt to deflect from the real questions, but I’ll answer for GP.
Denominations are man made... I am a Jesus Chirst believing, Bible thumping, and God fearing man that believes every word of the Bible no more no less.
Deny the Trinity? I’ll let Holy Scripture answer that question.
Colossians 2:8-10
8 See to it that no one takes you captive through philosophy and empty deception, according to the tradition of men, according to the elementary principles of the world, rather than according to Christ. 9 For in Him all the fullness of Deity dwells in bodily form, 10 and in Him you have been made complete, and He is the head over all rule and authority;…
Then we are agreed that the entire Protestant Reformation of the Christian faith was man made.