observe other areas of success in their life. If you have a good career, a nice house, well behaved kids, and are physically fit, people are more likely to assume you know what you're talking about and are more likely to listen to you and assume the advice you're giving is good.
There is, unfortunately, also a "reverse" halo effect, or horn effect. If you don't have your shit together, people are much less likely to care what you have to say. If you don't have a job, can't get a girlfriend, are physically repulsive, seem angry all the time etc, people are going to disregard what you have to say out of hand and assume your life failures are heavily influencing your worldview, and frankly, they are probably right.
If you actually care about politics and want to change the world, the very best thing you can do is improve your own life so you actually have a position to influence other people. Posting online is almost completely pointless, and as I've established, if your life is fucked up the people in your life do not care what you have to say. Get your shit together on a foundational level and then come back and fix the world.
Get a girlfriend. What you want and what you need here are going to be at odds at first. You are probably not going to be able to score an 8/10 virgin tradwife because those women don't exist outside of fundamentalist religious cults. Real women experiment sexually and you need to learn not to be threatened by that. You need to find someone with compatible values and interests, from a good family, who'll be a good companion for you. If you're 28+ you're probably going to be looking at being a stepfather. You've wasted too much of your life and it's nobody's fault but yours.