I understand how frustrating that must be. It sucks to have people tell you all of your life that you can't do certain things because of your intelligence and then have someone tell you it's "not real".
I think most people who say this (including the person you're replying to) are trying to reassure you, not dismiss you. The origins of IQ are arguably racist/classist and the science behind it is disputed by many. I was told all my life that i had an above average IQ, but i never understood why. I didn't feel smarter than my classmates and I did poorly in school. I later learned that I did well on the IQ test because of my economic background and the resources that I had available to me from a young age.
Intelligence is such a broad concept that we frankly don't fully understand yet. So the fact that we measure peoples intelligence and worth over a number is bullshit and dystopian. This is where the split in your experience comes from. You feel the effects of a low IQ because society values it too much. But most people know it's a metric that's used as a cudgel against others.
In other words, I very much believe that you are treated differently and have fewer opportunities as a result of your IQ, but that's an indictment of our society; not you. On top of it all, it sounds like you didn't have the support network that other people have. Verbal and physical abuse from the people who should be our guardians and champions (your father) will stomp the spirit out of anyone.
I know it might not be comforting, but I read your post and you didn't seem unintelligent to me. Sure, your sentence structure might be different than mine, but you seem like a thoughtful and connected person. What I'm missing, most likely, is the effort, time and energy that it may have taken you to write your original post, which i dont want to discount. But you're able to get your thoughts and feelings across just fine, at least in the form of writing.
Alright, enough with the pep-talk. Do you have any interests or things you like to spend time with? Video games? Animals? Exercise? Drawing? Writing? Makeup? Anime? Cooking? It doesn't matter if you think you're bad at them -- I'd recommend pursuing those interests. Sometimes volunteer work opens up opportunities that you haven't considered. It can also help you create that social safety net that I was talking about earlier.
I would try to get a job that gets you by (I know, easier said than done). Something like janitor work, fast food, retail, or hotel service. It doesn't have to be permanent, but just something to keep a cashflow while you give yourself time and room to grow. I'm not sure where your located, but I would check for non-profits or local orgs that offer assistance to folks.
Don't let our psychotic and unhealthy society dictate your worth. You are a human being who has thoughts and feelings. Your ability to hold a job or quuckly solve a problem is relatively superficial.
You have to remind yourself that Jewish people are just as negatively affected by this incorrect narrative, if not more. Jews are not a monolyth, and yet they are treated as such in the media. A nation state (if you want to call it that) is not synonymous with Judaism. We are watching an entire, vulnerable culture hijacked by imperial interests and capital with the intent of wiping out another vulnerable culture. Israel and their population is being used as a proxy and a buffer for the rich and powerful within the west to accomplish their goals in the Middle East.
The facts are there, but the way they are presented matters. Yes, Israel is trying to censor our politicians and media in the US. Yes, most Israelis are Jews, but not all Jews are Israeli, and not all Israeli Jews necessarily agree with Israel. Israel is actively breeding Anti-Semitic sentiment by constantly associating their horrific and unlawful actions to the will of Jews. They further endanger Jews by misrepresenting their opposition and protests against them as antisemitetic. It ends up clouding the real rise of antisemitism in the world and causes people to treat it unseriously. They are doing the opposite of keeping Jews safe, and they are endangering them elsewhere in the world.
In regard to controlling the media, the fact of the matter is that we've left ourselves vulnerable in the United States by letting anyone limit our free press and government. That includes lobbyists from any country, let alone one that's actively committing genocide.
Given your comment, I'm sure you know all of this, but others might not.