How often do you fluff your pillows?

As a moderately broad shouldered guy who prefers side sleeping, I need robust pillow support.

I find that no pillow I buy, at any price, will last more than six months before its going flat every night.

Am I upset about about something that's perfectly normal here?

Like the "normal amount of toilet roll," I feel like this is one of those things that we never know what is normal for others.