If you're an Old-Testament-Kind-of-Guy, here are some readings that might be helpful:

"Old Testament passages on anger emphasize that being slow to anger is a virtue of wisdom and strength, while hasty, unrestrained wrath leads to sin and folly. Key verses advocate for controlling one's spirit (Proverbs 16:32), turning from evil (Psalm 37:8), and showing mercy, as God is described as "slow to anger and abounding in steadfast love" (Psalm 103:8)"

...but you are a New-Testament-Kind-of-Guy, here's a reading for you:

“Know this, my beloved brothers: let every person be quick to hear, slow to speak, slow to anger; for the anger of man does not produce the righteousness of God” (James 1:19-20, ESV).

...and if you are not a Christian, count your blessings anyway: The only thing that is frustrating you right now is your wife's battle with her phone. At least, she can find her phone. (My husband asks me 10 times a day where his cell phone is; and when I tell him that it's in his office, he asks me his office is.) Just hope that your wife's condition doesn't progress to the point where she starts walking out the door naked, or lose control over her bladder and/or bowels, etc.

I feel for you because we are in the same boat--only much more advanced down the road in this unwanted journey. Keep your sense of humor! I joke that God gave me an 84-year-old, two-year old to teach me to be a better mother. (I raised three children, one of whom called me a "so-called mom" when she was 10 years old.)

Don't sweat the small stuff.

All my prayers,
George's Wife (77-year-old mother)