As @plus notes, omega-3 oils don’t break down into amino acids. You may be thinking of the fact that the omega-3 ALA is converted by the body into the two essential omega-3’s, EPA and DHA - but that process is not very efficient, so it’s generally recommend to get EPA and DHA directly, rather than depending on conversion from ALA. (ALA is high in some plant sources, while EPA and DHA are higher in animal sources, especially oily fish.)
Blue-green algae are not actually plants; they’re cyanobacteria, and these tiny green one-celled animals photosynthesize like plants, but produce EPA and DHA like animals. That makes them a fascinating source for these oils, especially for people who are opposed to consuming higher animals. So the oil in the 1.2 mix can provide EPA and DHA just as well as fish oil. (Side note: current evolutionary theories propose that ancient cyanobacteria infected host cells and lived within them symbiotically, eventually becoming chloroplasts - the green organelles inside of plant cells which give modern plants the ability to photosynthesize.)
On creatine - we do seem to be capable of producing all the creatine we need for normal healthy function. That being said, 95% of our creatine is in our skeletal muscles, and elevating the creatine in the muscles does turn out to improve certain kinds of athletic performance - this is fairly well-studied and well-established. While we can create all the creatine we need, getting creatine from your diet can boost your levels. Animal products like meat contain creatine because those animals, like us, produced the creatine they needed. People who eat animal products end up with higher creatine levels than vegetarians. To get a measurable performance-boosting effect, however, people supplement with substantially higher levels of powdered creatine - much higher than you get from a very-high-protein-diet. While the science behind this is well-established, the effect is relatively small, and is generally only detectable in studies only when using measurement levels generally applicable only to elite athletes.
Creatine loading also causes causes a measureable increase in muscle size because it brings a little water into muscle cells. Anything that cause can provide a performance benefit and causes even a trifling increase in muscle size becomes very popular in the bodybuilding and fitness community.
The fact that “creatien actually works’” to increase muscle size and athletic performance doesn’t necessarily lead to a rational need to supplement creatine in otherwise-heatlhy people. I know there’s research around creatine supplementation for people with compromised systems (such as the elderly, who may not produce as much as they need), but the studies on finding other benefits from creatine supplementation for younger people have gone back and forth and not found very much.