Ignorance isn't bliss, a comfortable, safe living environment and satisfied life goals is bliss
the more you unlock the secrets to the universe around you
Nearly everything you've said here is wrong, you know. My IQ tested out at 184 the last time I took one of those very high IQ tests, decades ago - most IQ tests stop measuring at 140 and I've maxed out a few of those in my time. I have a bucketload of diplomas and a career to suggest that those results weren't flukes. And I'm not just good at one or two things, I'm a polymath, I can do a lot of things well.
Am I happy? Pretty fucking far from it. First of all, stupid people are everywhere, and some of them have great power over important things. My life has been a struggle to deprive stupid people of power over me, and it's been only a limited success. Stupid people waste my time and are very frustrating to deal with, especially when they choose not to trust me. When they find out later that I was right - and I'm usually right, about anything I choose to open my mouth about - do you think it makes me loved? Nope. Know-it-all, condescending, arrogant - these are the arrows shot at me by people whose ego integrity is threatened by the idea that I could be so right and what they wanted to be true could have been so wrong. Case in point - this paragraph. How do you like it? Probably not at all.
Riddling out the universe? You know, mammals like affection, the acceptance of the herd, fellow-feeling, and love. We like to get it - we're wired to. Manipulating other herd animals into giving those things is something people spend a lot of time on. I'm better at it than most - but it's an empty achievement. Young adults put all their energy into the mating dance, middle aged folks throw themselves into childrearing, their careers, or hobbies; old folks are dull. Your children will reject you, you will outlive your career, your entire life will end and unless you were pretty fucking special no one will remember you after a while. And most of us aren't very special. Kindness? I work at it but I'm no Gandhi, I'll never win a medal for it.
You're a mindless automaton evolved for DNA replication on a formerly barren rock amidst an uncaring universe made mostly of inaccessible energies and molecular hydrogen. So am I. The emotions you struggle to repress are mostly products of your genetic heritage and your upbringing and no matter the outcome of your struggle it's completely meaningless.
Finally: comfort, safety and an end to striving for goals can be found most conveniently in a padded coffin. What you call happiness isn't happiness for a human being; it's death. Happiness is a willingness to meet the struggle head on, day after day, and throw your shoulder into it with a grin and a kind word; if you really want to do that and believe in that, you need to be stupid.