Thanks for your comment :)

The Freeze-in scenario looks more plausible as we could see in the LHC that heavier particles decays to dark matter. So maybe there were only visible matter at the beginning and the high temperature and collision created dark matter.

Freezing-out dark matter is still very very viable, even if not any dark matter particle has been found at the LHC so far. The LHC has excluded the most naive scenarios, but there are much more interesting models. Which is why anything non standard but theoretically motivated is interesting (we need to stay open-minded).

In fact, there is nothing that tells us that dark matter will be found at the LHC.

Also, it is funny of you to put a wiki link to the definition of many XD

There is always a couple of unrelated links in my articles, for the fun ;)