It is not just the uneducated either. I have a co worker with two degrees who was an English teacher for 15 years. I was commenting on this thread and mentioned that I do not always use the proper structure for ellipses when typing fast. She looked at me confused, and I replied, "phrase, space, period, period, period. space, phrase/word". She said she never knew what that was called and never used spaces before and after the dots.
As does anyone who types a lot, I make typos and mistakes in grammar and spelling. The difference is that I ( and the others on this thread) usually re-read the wording and check for these errors. Some still slip through, but at least I checked. I truly believe that the vast majority of online and social media posts have never been re-read for content and grammar/spelling. The finger flying folks who are typing on phones apparently not concerned with the extra step to create a capital letter or a punctuation mark.
One other beef is makers ( usually young) who email me a question and I give them a link to a site with the answer or refer them to a tutorial in The Stickys. They reply that it is too hard to read all that on the small phone screen, and could I just condense it for them and tell them what to do.