Hey author, let's take a look at some of the issues that caused your work to fall into the negatives, this critique is meant purely as constructive criticism and should not be percieved as a personal attack on you or your writing skills.
Item #: SCP-3457
Status: Classified
There is no point in making an article "Classified", in case you want to specify what clearance is necessary, be sure to take a look into Security Clearance Levels. Keep in mind that SCP Files are meant to be easily accessible documents that can be scanned through in a hurry in case there's a containment breach of the titular, even if the SCP you're writing about isn't capable of breaching containment for one reason or another there's no point in keeping information about it's anomalous properties away from general Foundation staff.
Object Class: Euclid
From what I've seen of it, your SCP feels like more of a -Safe than an -Euclid class, remember, -Safe classifications do not mean that the anomaly is incapable of causing harm, only that it does not exhibit any unpredictable properties while in containment, Euclids are generally beings that exhibit some form of autonomy or sapience, 3457 exhibits neither of those.
Special Containment Procedures: SCP-3457 needs to be contained 5 x 5 x 5 m chamber, with full radiated air in the chamber that will stop the liquid from regenerating.
Some grammar issues appear from this point foward, remember to read our entries on Clinical Tone and Technical Words for instructions on how to properly emulate the Foundation's standard writing style.
In addition, exact measurements of chambers and the sort are generally to be avoided unless the anomaly contained within specifically requires them, for example, would 3457 be any more dangerous or unpredictable if kept in a 4 x 4 x 4 chamber instead?
Description: SCP-3457 is a coke bottle infected with a parasite from an unknown origin and genus. SCP-3457 Was found in an abandoned village by the name of Les████ in the country of Macedonia. If SCP-3457 is within a 5 m radius of the subject, the subject will experience nausea and extreme wish of drinking the substance. The more the exposure the more wish to drink the substance. After the subject has drank the substance 5 minutes in he will expirience extreme blister creation and paralyzation. 10 minutes after the exposure the coke bottle will extract tubes from inside the bottle and will start to attach to the subjects blisters, at this point the subject becomes colorless and all fat tissues and muscle tissue gets sucked out and the only thing that is visible is skin and bones, At this point the subject is dead and starts vaporizing after that the coke bottle refills its liquid (most likely from the subjects tissues).
Same issues with grammar in the description, in particular, you might want to break up that wall of text into several smaller ones, any information about the anomaly's recovery might be kept in a "Recovery Log" addendum located below the description, though that is not required.
Finally, the main problem with your article is the lack of any narrative format, keep in mind that just being a "thing what does X" requires an incredible amount of creative drive and writing prowess in order to survive in the Main Page, otherwise it could simply be moved to the Log of Anomalous Items, I suggest that you add some more extensive backstory or Experiment Log if you intend to keep 3457 as is.
At last, your current Experiment Log possesses formatting issues, as all addendums to the main page should be kept inside a Quotation Block with dialogue separated by line breaks, be sure to check the formatting tab on How to Write an SCP for more information on that. In addition, your dialogue appears clunky and uses mostly outdated terms such as "terminated" that really shouldn't appear outside of descriptions, I suggest that you mostly avoid direct dialogue in your first few articles as it takes quite a lot of experience to be able to write convincing conversations.
Overall, your article needs some major revisions to be able to survive as is, I suggest getting some feedback at the forums before posting something like this. In addition, it can help asking for a Collab with a more experienced writers for your drafts, just remember that no one is obliged to do as you say.
I hope I was able to clear up any worries you might have had when witnessing the negative reception, remember that the Foundation expects a lot of quality from its writers, especially in its current state, but don't let that discourage you, just keep on trying and improving your writing skills until you reach that threshold, it won't be an easy path ahead, but one that you must overcome.
Good Luck.