@E9ine_AC Good thing you have some dev knowledge. Explanations can be found for most of your questions though.
EAC does detect a lot of things, but it's already very invasive. Stricter rules might lead to a lot of false positives resulting in banning innocent players or device crashes due to the blocking of certain things running in the background. There's also a chance of breaking some data protection laws if the software digs too deep.
Another thing, EAC works clientside, it's easier to find it's flaws and bypass it. It's not hard to imagine that it's far from being bulletproof, when even some of the highest security, remote places in this world aren't 100% safe from hackers.
Regarding movement rates and shot patterns, they're more on Respawn, because coders set the rules, thresolds, limitations, etc.. The physics engine of this game is limited for an obvious reason: performance. A frame needs to be processed in just a few miliseconds, not in minutes, hours or days 🙂. A simplified physics engine will always go crazy in certain situations, especially when there's data loss. Don't think anyone would want to get a ban on top of connection issues. Then, verifying all the actions thoroughly would come with a performance drop, because it's an intensive process (can be seen as similar to an antivirus scanning). Don't think Apex would run at more than 20-30 fps even on high end machines. I'd say the biggest compromise needed to be made here.
It's pretty easy to avoid repeating patterns by introducing some randomness into a hack. Also, it's not enough for a pattern to repeat, it has to be proven wrong. A player hitting 2 consecutive headshots 3 times in a row is not enough proof he's a cheater.
And regarding bugs, think of this project as if it's a racecar running at Le Mans, that they need to fix during stops as fast as possible to keep it in the race. It's like that, but also working remotely. Not hard to imagine that pit stop times are much higher without synchronization.
Not saying that they can't make the game better, I'm sure they want it and they will eventually. Their absence in the social media is for good reasons, as it usually is a distraction.