Like it or not, Smogon guides have always be first about knowledge (raw information like pokemon stats and movesets) and second about strategy (preferred movesets and team structure), with skill (how to actually play the game intelligently) being a very distant third. In other words, what you're looking for is barely covered at all on the Smogon article dex or on the forum and to get more help there you will have to dig pretty deep on this site. The sun article you linked to is a perfect example of this, never once discussing what resources a sun team should prioritize, how much they should bank on prediction, what a typical win condition for sun teams should look like, or whether wins are typically momentum or material based. That shit is way more important than spending a page describing every obscure moveset of how Jumpluff and Victreebell can abuse frigging Chlorophyll, yet that's literally as deep as that article ever gets. It's kind of sad that we expect people to go through a mentorship process to learn about mindgaming, resource management, momentum control and prediction when some good articles on the subject could be just as effective.
That's not to say these types of guides don't exist. These guides on
psychological warfare and
risk/reward guides do a good job teaching about the basic concepts of resource management and mindgaming in Pokemon, though they don't really cover momentum control and less abstract descriptions of how to use these tactics with specific team archetypes.
This video is primarily related to chess but its main lesson is incredibly important- "to take is a mistake" (when it means giving your opponent a chance to reverse momentum) is absolutely fundamental to becoming better at Pokemon and new players unfortunately tend to lose matches by ignoring this on a regular basis. I've written about
material based play in Gen 5 OU, though some of the basic concepts are still applicable here. Entire essays could be written about momentum control in Gen 6 but I haven't seen anything particularly cohesive yet. I'd say your best bet for improving your skills in this gen is to try to watch matches by advanced players and listen to commentary from
reasonably intelligent Youtube battlers, though once again, that isn't a replacement for really understanding the theory behind what makes effective play in these battles.