After 10yrs and numerous bouts of instruction, my husband is still unable to make a decent cup of tea?

Is it time to throw in the towel? What part of nice and strong, one sugar, hardly any milk is so difficult to get right? 10 yrs without a decent cup of tea unless I do it myself!
Update: Of course I wouldn't really divorce him for this but, I have shown him how I like my tea, not in a nagging way but having a laugh about it and he still gets it wrong.
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