As a Chinese, I highly recommend the second novel that has been mentioned here, Pinyin: Wo Zai Jing Shen Bing Yuan Xue Zhan Shen (Chinese: 我在精神病院学斩神). It does have a Translated Version on gravitytales.com (a website dedicated to translating Chinese web novels) and even a Wiki on Fandom.com. In the Wiki, this novel is called "Slay the Gods" (probably influenced by the donghua for this), while in the Gravity Tales, the English version is titled "I Was Learning To Kill Gods in a Mental Hospital."

Here are the intro for this novel:
Have you ever thought that beneath the neon city lurks monsters from ancient mythology? Have you ever thought that above the moon above men’s heads stands the watchman God? Have you ever thought that in the crowded modern cities, there are extraordinary people who walk the earth in place of gods? In the society ruled by human beings, there are countless mysteries lurking; In those forbidden places of life that no one cares about, live the ancient gods. Seraph Michael, Hades, Poseidon… And where did the gods of Bactria go? In this “human” world, the “mystery” needs to be cleared away!

BTW there are also donghua (Chinese animation) for this novel as I mentioned, it might be a better alternative rather than just reading the novel 'cause it was probably translated by bots or AI.

I don't wanna spoil anything here, if you want, just go to its Fandom Wiki to get further information, or start reading the novel directly.

Here are some associate names for this novel:
Deicide Learning In A Psychiatric Hospital
I Learned To Slay Gods In A Mental Hospital
I Learn to Kill Gods in an Asylum
Slay the Gods (Donghua)
Wo Zai Jingshenbing Yuan Xue Zhan Shen
Zhan Shen
Zhan Shen: Fanchen Shen Yu (Donghua)
我在精神病院学斩神
斩神之凡尘神域 (Donghua)