You older guys who have been married for a long time have no idea what's out there now.
These modern women have been conditioned through social media to believe that they are the prize. They don't even consider how they can be of benefit to the man because its all about their wants and needs. The current social and political environment normalizes their natural strategy to always assess if what they managed to lock down is good enough, and encourages them to always upgrade.
What you call a "wife who supports you" is simply a woman who makes the calculation that if I give this guy some of my attention, I should reap the benefits for my time by making sure my "cash cow" is in top working order. But the minute that she starts to think that her efforts might be better spent on someone new, its game over for you. Its no different than a trade that is going against you. At some point you have to realize you got the direction wrong and take the opposite side.
Lastly, a woman who says she will support her man is lying. If we mean financial support, well, we can throw that out the window immediately. For emotional support, no woman can support a man because she will look at him in disgust for not having the skills to solve his own problem. If your trading one day goes through a rough patch and you're down on yourself and unsure of your future, she will not think "how can I help my man", she will think "what's the fastest way to latch on to the next one".
Gentleman, most of us men aren't taught this, but the truth of the matter is that a woman can only provide you with 2 things. One is babies, and two is sex. Everything else you need, you have to find elsewhere. Maybe a bit of companionship can be thrown in there, but if you start to rely on her too much for the said companionship, now you're being seen as weak, and here starts the downward spiral.
You guys that are in relationships for decades didn't find the magical unicorn, you have a woman who at the time needed a man for survival and the resources to raise children. If you tried to repeat this in the current environment, you would be dead in the water since modern women no longer have to do what the previous generation of women had to.
damn bro, whoever she is, she must've fucked your life up. Must be pretty traumatic to have that outlook on women. I actually have a friend who thinks pretty much like you. In his early 30s, been dumped by few women in his life and now thinks all women are cunts (maybe more extreme than you). But my condolences bro, it'll be alright. There are GOOD women are there.