Brief summary (actually spoiler)

Overall, the idea there is no overall plotline at all is pretty s*upid given there just is ("System-Origin" (This one isn't explored much yet, will point the system is probably not an ai unlike other reviews compare it to), "Deep Caves", "Heaven Killer / Successor", and "Space Colliding") , introduced in roughly that order. ("Deep Caves" is resolved before leaving the MC home planet) Others are currently constantly being revisited with new information..."Heaven" and the "System" seem to be overall arching plots for the WHOLE story whilst "Deep Caves" and "Space Colliding" are plots to move the MC forward.

As I said in the spoiler section the novel before leaving the Blue Planet definitely has a lot of sub-plot-lines. But they are usually to get the MC to go out and find some information for the plot (since he otherwise wouldn't leave the shop, later goes out more willingly when he wishes to gets the drive to continually get stronger to protect himself and others) and, at least I believe, they are pretty well connected in the grand scheme of that section of the novel. Whether they are "boring" or not is more subjective but I found it fine.

Yep...? He is actually constantly reminded that he is VERY weak in the grand scheme of the world thanks to his connection to all locations given by the System, it's this and those feelings of weakness in his own world that end up driving him to be stronger still constantly. But... when against those on his own level or ONE (specific) above he is definitely a Gary Stu... but he isn't trying to fight on the same level. And, simply being "overpowered" isn't really enough to call it bad.

eh... not really. There are definitely occasions where the MC did go mu*der hobo and definitely shouldn't of killed someone. But in a vast majority of cases the MC doesn't actually kill without reason. This was actually something I really liked of this novel. It didn't force a "no killing" or "ALL THE KILLING" stance. The MC has a pretty clear stance and holds to it pretty well (EXTREMELY well by Chinese novel standards).

MC kills on these occasions:

Someone attempts to kill him (Which I hope makes sense...)
They are in a locations/situation where mercy is lost (If you are in a place where mu*der is expected... expect it, this is usually in trial locations or in duels, a point could be made in some duels that death was 100% expected and even if on purpose wasn't done candidly, whilst the MC is completely willing to own up to the fact it was on purpose...I just don't really see that as bad though given the world he lives in)
They are of a certain force. (So... non-tamed beasts and I cannot think of a human/god etc group right now)
To protect someone he knows/is a friend with.
but yeah... actually pretty principled given the world the MC is placed in

MC is definitely dumb at occasions (would actually be a problem if he wasn't though)... slight spoiler but when he goes to other cultivation sites he is sometimes (isn't confirmed if it is always) not in the same time period that the site is currently in (Both confirmed cases as of c1098 have been to the past). I am genuinely baffled how he doesn't f*cking figure that out, it makes sense that the characters in the sites that do end up knowing keep it a secret from him but it isn't that f*cking hard to figure out himself.

The review that said this was going on about how supreme beings weren't using soul/mind magic on the MC to deal with him... firstly... they at least using soul magic to kill him off, pretty sure that is how he finds out the even destroying his soul doesn't work against the System revival. Mind magic in itself isn't used, but Mind pressure abilities are used abundantly and is actually REALLY important, since this is the basis of the Mc's heavily increased willpower. This point is just wrong. (Also in most cases the MC just gets killed in other ways and revives far away so there wouldn't be a chance, totally reasonable that a supreme being wouldn't immediately jump to destroying a soul to deal with the human equivalent of less than an ant)

Yep. Some of the characters are f*cking s*upid. A point I can agree with. Will say this novel is better in this regards compared to other Chinese novels. But the flaw is there and I cannot say it isn't a bad point.

Also yes. A flaw picked up from the cultivation genre... there is definitely a case of "problem" "agrwy" "kill" "resolve" "repeat". Will say that it isn't inherently a flaw and whether you will enjoy it or find it horribly annoying will be your opinion. As with most the other points... this novel does pretty well avoiding or making it at least somewhat unique even if some of the minor characters / plot lines are just.. boringly samey.