A theist will present as evidence certain things (creation, beauty, goodness, miracles, revelations, holy writings) that a rationalist will dismiss as valid evidence.
"Dismiss" is wrong.
Refute with objective evidence to the contrary.
You need to consider the difference between objective and subjective.
no affirmative evidence of the inexistence of god
Totally back-to-front.
The burden is on the believer to bring objective evidence to the table. So far I have seen none.
Atheism is a rejection of the grandiose claims of theism. That's all.
But you have been told that a hundred times in the past few days.