The above comment seems unnecessarily vitriolic.
> free reign to antagonize newcomers
Nobody has "free reign to antagonize" anyone including newcomers. It's hard to come to a new large community and project with somewhat unusual norms, and established editors should try to do a better job helping people learn the ropes, but at the same time I have gone to look repeatedly when some newcomer complained about being antagonized (either complained here, or other forums, or on Wikipedia) and maybe half the time the newcomer making the complaint was being a total jerk to everyone but really didn't like being called out.
If you (the generic you reading this comment) want to put a bunch of volunteer effort into finding newcomers who are having a tough time and helping them out that would be a valuable contribution. On an all-volunteer project people do what they are interested and unfortunately intermediating on newcomers' behalf is usually not it (I do try to help when I can).
> in 2014, too, but it wasn't dominated by the problems [...]
To my recollection is has been continually dominated by similar kinds of issues, since close to the beginning. It was then, and still is now, often a frustrating slog when multiple editors disagree about something, especially if there's some kind of (typically unstated) ideological motivation involved, e.g. promoting one ethnic group or nation. There are various dispute resolution processes, which work more or less, mainly by attracting more eyeballs any time there is a stuck conflict, but trying to form consensus with a pseodonymous global group of volunteers is just an inherently hard problem.
The main differences between the first few years vs. today are that (1) many topics at least have some kind of article written about them (often still mediocre, especially parts from the early days that haven't seen much dedicated focused effort) which means that there's a bit more bias toward preserving what is already there (an understandable tendency in the face of a constant onslaught of vandalism and entropy), (2) people recently tend to demand a bit better sourcing for claims than was done up to about 2010, so there's sometimes a bit of a disconnect between the quality standard applied to existing material vs. newly added/changed material, and (3) there's a bit more focus than before on earning little gamified badges like stars or green + signs in the corners of articles.