You will never get it in your whacked brain, the TOS crew were competant, and yes they may have had their faults, like every human does, but even in trying times, they got the job done, it was good entertainment.
You will never get in your denial brain THAT WAS THE POINT.
Really Gene talked about this many many times in various interviews. Especially when he had to do a second stab at the pilot. He deliberately built the cast of characters to address all the social-political issues of the time, and show a world where we’d moved past all of them and simply accepted people for their accomplishments and weren’t worried about gender, or color, or previous wars, or current wars. A humanity ruled by our better angels. That was the whole goal. He said it himself.