Give an example of what "overturning the five-flavor bottle" means?

My heart felt like I had knocked over a five-flavor bottle. It tasted sour, sweet, bitter, spicy, and salty. Describes a very helpless and awkward state of mind.

For example: Look at my classmate Zhang San, who has a house, car, wife and children. Then look at myself, I have been working as a substitute teacher for half my life, and I was laid off again in my middle age. I am still single and poor. Like washing. Every time I think of this, I feel like I've knocked over the five-flavor bottle. It's sour, sweet, bitter, spicy, salty, not a good taste.