In Dragon Ball, that is a manga / anime for children, Goku die some times and the planets are destroyed. In DB Super various universes are erased. But then thanks to the dragon balls, things are restored.
In manga / anime exaggerated things often happen, but you must not consider them exclusively in a narrative and realistic sense, especially when the author himself doesn't consider them seriously, or explicitly declares that events must also be interpreted in a metaphorical sense.
See here this Anno's interview: https://youtu.be/4CdNJqgCRLU
(Sub ENG in the comments)
An artwork is not reality, but it is a "what if". The killing of all humanity takes place on a logical-imaginary level, not on the ontological-real level. You do not have to use only the categories of thought of the real level on the events of the imaginary level, otherwise you make a mistake.
Don't worry, you don't have the power to destroy all humanity.
If you don't see the 26 episodes of NGE directly, you won't be able to get out of this vicious traumatic circle you ended up in. The best thing to do is to acknowledge that you made a mistake (watching EoE without seeing NGE), and start watching NGE from the beginning.
The first 7 episodes are introductory, then there are 6 nice episodes, then 1 summary episode that opens to the second part, then 7 episodes in which events become difficult, 3 dramatic episodes, 2 final episodes in which the problems of the relationship of the individual with himself and with the world are analized, and solutions are proposed, points of reference from which to start to live. Obviously it's Anno's answer. NGE end in a good mode, Shinji smile, EoE end in a ambiguous mode, Shinji cry, and this endings are complementary like yin and yang.
Other than these things I wrote to you I wouldn't know how to help you. Think if you write a book, a your friend reads only one chapter and doesn't like it. What would you say to him? He should read the whole book in order to understand the story and make a judgment. So, don't worry, give Evangelion some possibilities, but also take care of yourself and the people you love, and when you have a difficulty, say: "I can't understand this thing, can you explain it to me?"
Btw, this is the Shinji smile in the last episode:https://vignette.wikia.nocookie.net/eva ... 0727131516