Nope. There’s no compelling way. Because they don’t care.
I am also coming on to 20 years in the same place.
We were always overworked but recently there is also a massive shortage so they’ve been hiring contractual employees who know absolutely nothing. So we now have to teach them and do their work (because they can’t or won’t learn) and I’d rather they didn’t hire anyone.
I was begging our director for the past 3-4 months to either train these people himself or don’t hire them because I can’t spend my time teaching them and then do their work because they can’t learn or don’t care enough to learn.
They don’t care that you have too much work. They really don’t.