I’m curious to read some of your reasons because it seems it isn’t a well thought out decision, or it is based on simple reasons like ‘just because’ or ‘I don’t see proof’. I’m coming from a Buddhist background, and despite some misunderstanding, Buddhism is not Atheist. A thorough investigation will prove this.
What is a Deity? In Buddhism, a person, through training their mind can achieve mastery of the subtle body even in dream, and they can also achieve profound realizations in which they join an enlightened society of holy beings. They can see Deities, or highly realized beings (Bodhisattvas and Buddhas) either with their mental consciousness or even with their coarse eyes. Precise examination of Buddhism, especially completion stage in Highest Yoga Tantra, and gaining personal experience of this will show the existence of Deities. As personal experience of many people shows, especially in the commentaries by Masters of what is possible, disbelief becomes baseless and useless.