Corruption is such a deep force that most high IQ people are still very corrupt.
High IQ cannot save you from corruption and bias.
The reason people support Trump is because they are corrupt. So corrupt they don't even know what corruption is.
Corruption gravitates towards corruption regardless of all other factors. Corruption is the real master.
Having an Awakening is not enough to understand corruption.

@Daniel Balan He gets the hate from MAGA people because he advocates for green values using his money, like for LGBTQ+ rights, refugee aid, criminal justice reform, democratic movement, humane and rational immigration policies and international cooperation. In general, he is also seen as part of conspiracies because he is a Jewish billionaire philanthropist who influences global politics. Notice the bias in the conspiratorial thinking: the Koch brothers are also billionaires who influence global politics but get no hate cause they stand for conservative values. Soros is seen as satanic for the pre-modern worldview cause the pluralistic values he advocates for are seen as alien and as a thread for identity.
As I read under a video essay, "conspiracism is pre-modern thought applied to post-modern politics."

A crucial part of this work is developing finacial freedom so you can be independent of culture and people. If you're broke then you are at the mercy of corrupt and unconscious people.

That's right, independent thinking is no guarantee of proper sense-making or truth. It's just the bare minimum to even stand a chance. Independent thinking easily turns into corruption or distortion.
1) In your case you can clearly see through a bit of self-reflection that your worldview is strongly colored by hurtful traumatic events. This kind of emotionality creates bias and distorts sense-making. So a simple answer to your question is to not ever make an worldview based on hurt, bitterness, or suffering, since such a worldview will be distorted and dysfunctional. Basically, don't construct worldviews based on negative emotional states.
So in this case, proper independent thinking should have led you to see that your worldview was constructed from a place of trauma, which is not a sound way for constructing a worldview. Imagine if I constructed the entire Actualized.org worldview based on my mother abusing me as a child. Would that be an accurate worldview? Clearly not. I would first need to heal that trauma before I could construct a proper worldview.
2) There cannot be any formula for avoiding self-deception. The only solution is live consciousness and active intelligence. This intelligence must be active at all times and self-reflecting. It cannot be a one-and-done thing. You must keep being intelligent as long as you live.
3) Practically, in your case, therapy would be a good way to gain more clarity over your worldview. Psychedelics as well of course.
4) If you have deep Awakenings or realization of Infinity/Love/God, then you will realize that self/other is an imaginary duality which must collapse. From this understanding you can know that your bitterness and hatred of mankind cannot be truthful, because mankind is just an aspect of God/Infinity/Love/Self. The truth is that the same people who killed your dog are metaphysically identical to your dog and yourself, since there is no difference between self and other at the highest level of reality. So in order to heal yourself from this tragedy would require connecting with that disowned, shadow aspect of yourself. The thing you hate the most -- the people who killed your dog -- is the thing that you will ultimately need to realize as identical to yourself. That would be the conclusion which results in the healing. But that is a tall order. I'm not tell you to necessarily just do it right now. You probably need much more time to pass before you are ready to face such radical integration.
I'm sorry, this is difficult to tell you, but the following applies here:
https://www.actualized.org/insights/actualized-quotes-090
The entire challenge of spirituality is to integrate that.
To integrate that basically requires complete Awakening beyond what a human mind can imagine. It would be an Awakening so deep that you would basically die and return from the grave. In that moment of death, death itself would heal you. (I am not talking about suicide.)
When the self dies, God's love cleanses your psyche of corruption by melting you into pure Infinity. An ocean of love where your dog, yourself, and your enemy are One. This Oneness is Absolute Truth. From this Truth all sense-making must derive, otherwise it will be corrupt.

@Daniel Balan Something to keep in mind: you don't need to trust humans fully. You understand that they will be selfish, so you maintain a certain mild caution in all dealings with humans and you calibrate it based on red flags they send out.
Most people are decent as long as their survival is not at stake at the moment.

Vote for the highest stage running who has a decent chance of winning.
That's the principle.
Do not vote for people who have no chance of winning even if they are Jesus. Jesus is never going to win an election so don't even consider that option.

@Daniel Balan I simply mean be truthful in everything you do.
Don't think of truth as a singular thing that one gets and knows, like some secret cheat code.
Truth is an aspect of all your dealings in life, from politics to business to relationships.