why, pray tell, would an organism somehow think that it could "overtake" the population by empregnating others of its own species?
There isn't any evidence that bacteria, and other simple organisms, are able to think.
Do we see bacteria and such attempting to dominate other bacteria with its DNA?
The theory of evolution is not about "attempting to dominate".
If sexual reproduction is "better", then why is the most effecient reproducing organism bacterium? Don't they reproduce asexually?
Take a look at
this description of bacterial conjugation.
How can you claim that it is a gradual process, when the parts that are added (even though I highly doubt anything could be added) are going to make the organism less efficient than the asexual organisms?
Less efficient at what?
The evidence shows that sexually reproducing species are quite effective at reproducing. Otherwise there wouldn't be any of them around.
Don't you think it's kind of odd that an organism wasting energy on supporting a sexual reproductive system would be able to survive?
No, it doesn't seem odd. It's clear that sexual reproduction provides a survival advantage in dealing with a changing environment.
And even if it could, how would it find a mate?
Did you miss the part about hermaphroditic species in the earlier posts?
If it simply asexually reproduces, and then mates with "itself", then you will have serious problems with the offspring, and they will not be able to sexually reproduce.
Do you have any evidence for that assertion?
You still must show how Natural Selection suddenly stops selecting, and then, continues selecting organisms further down the road.
And why would that ever be necessary?