I think the reason some people may feel empathy for the OP and his wife is due to the flavour of the OP's posts round about this time last year.
The OP was devastated to learn of his wife's infidelity. Reading between the lines, the OP was trying to make sense of why she had been unfaithful. They have been together for a very long time. In his descriptions of her over the various threads, in 2019 he refers to her as having been a loyal wife and mother, an intelligent woman, etc. I inferred from those early posts that he still loved her.
He also referred to her menopause symptoms and how they had affected both of them (e.g. having to sleep separately due to night sweats).
The OP's wife clearly loves him or she wouldn't plead with him not to leave her and she wouldn't say she wanted to grow old with him. (That's a beautiful thing to say, so very heartfelt).Despite the OP referring to her as manipulative, I still get the sense that her affair was in some way related to her menopausal symptoms. I get the sense that the OP is trying to process his thoughts and feelings and this process will include running the gamut of emotions. Sometimes he will refer to her as manipulative and controlling and at other times he will remember different aspects of her personality.
I am not trying to minimise this, but I think that after 30 years of loyalty, it is too much of a coincidence that the cheating coincides with the menopausal time-frame. I write from the perspective of a woman who has not had an affair and has been devastated to learn of my husband's emotional affair. I too have been through a long peri-menopause/menopause and have had awful side effects and I too had to sleep in a separate bed due to night sweats.
Other than people who just basically want to shag different people, I think when people seek emotional connections with others it is because they perceive that something is lacking in the marriage. The wise ones will speak to their partners about it. The foolish ones will not speak up, which is why they go on to find affair partners. The OP's wife falls into the latter category, clearly.