Better to be stupid and perfectly satisfied, than to be intelligent and entirely unsatisfied, without even the hope of satisfaction…
This is the classic stance of misology. It seems you have much self-reflection ahead of you in order to be better equipped to recognize the various flaws which congests this form of reasoning. In essence, you are spiting in the face of reason, which is God’s gift to humanity, and is exactly what sets us apart from all other animals.
It is true that reason is not competent to guide the will with certainty in regard to its objects and the satisfaction of all our wants. To some extent, reason may even multiply these wants. Indeed, those who are led purely by instinct seem, at first glance, to be much more sufficiently equipped to satisfy them with greater certainty.
However, we must extend our reasoning further to see exactly why this mode of thought can be so catastrophic and incredibly misleading.
Let us suppose that the purpose of life is happiness.
If the purpose of life is happiness, instinct would be the most effective organ in serving it.
Now, if this situation comes to pass, reason would receive a subsidiary role only (if any at all) - to assist us in appreciating the given constitution of nature and expressing our gratitude to the “beneficient cause” (God) for an instinctively regulated life. Reason itself would be barred from designing the “plan of happiness” and will be denied practical influence on its realization.
However, reason does influence our practical decisions.
Those who follow reason fall short of true satisfaction for their “needs.” Instead of providing immediate gratification of our wants, reason demands that we postpone it or even suspend it if it could not be regarded as morally acceptable.
The more reason controls action, the less satisfaction ensues (we get disappointed and even disillusioned).
The fact that we do not rave about the advantages of reason for happiness is not a sign of ingratitude toward God or Nature. Nor does it manifest the moroseness of our temperament. Just candidness and sincerity.
If reason still operates in life, its purpose could not possibly be happiness. It must have a different, far nobler end (a higher purpose) than happiness.
This end is to be known as joy.
Joy is only acquired through the use of reason, through prayer, through contemplation of the divine, and through adherence to God’s instructions. The mystery of joy is an incredible one in itself, and is worth an immense amount of contemplation in order to begin to appreciate.
Hope this helps.
Cheers.