It could be a matter of personal taste. For example, I like my beef roast on the rare side -- fully cooked, but still pink in the middle. My wife likes hers well-done, with a slightly burned crust on the outside. If I cook the roast "by the book", it comes out perfect for me, but "practically raw" for her. I usually end up cutting out my half of the roast and cooking hers until it is almost black.
It may not be an issue with the OP's recipes or cooking gear, but a matter of the OP's own personal tastes.
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