Has anyone actually mastered the cooling pillow hunt without falling for aggressive marketing gimmicks?

I feel like I have spent a small fortune this year trying to solve my constant overheating issue at night. My partner says I toss and turn because I am 'thermal regulating' like a broken radiator, which is probably accurate. I have tried the gel-infused foam blocks that start cool but turn into a warm brick by 3 AM, and those fancy bamboo covers that honestly just feel like overpriced synthetic fabric. I’m currently staring at my third failed pillow purchase of the month, feeling utterly defeated. Is there a genuine material out there that stays breathable throughout an entire sleep cycle, or is the 'cooling technology' label just a way to add fifty dollars to the price tag? I would love to hear if any of you have found something that actually holds its temperature, or if I should just accept my fate and invest in an expensive bedside fan setup instead. My neck and my wallet are both crying for a real solution.