Is deflation bad?

Ok, I don’t trust any other sub Reddit so I’m asking here. I’ve heard about healthy inflation which is caused by printing more more to keep up with a growing population. (I kind of get it)

But too much inflation obviously bad.

But is deflation bad? Like I’d happily cut everything in half, wages, house prices, food, fuel what ever… so I paid less in tax.

I don’t understand why it would be that bad? Why if inflation is bad the why deflation is also bad? Does that make sense? I have no idea. I just assumed the guy was wrong because he used the term “hoarding” instead of saving money and it irked me.