I am in the same boat, but was recently told I program very differently than most people. I write a bunch of stuff that does not attempt to be syntactically correct (everything from while(???){ } since I don't know what the exit condition is yet, to straight up interlacing "a --> something --> b" or random ascii drawing of trees, in the middle). To me code is very similar to writing an essay, especially at the beginning, I'll have random lines all over the place as I develop the idea, and only reign it in to something that will actually run much later. For this reason, I also am totally OK without syntax highlighting often. My editor of choice has a bug where it often won't syntax highlight on the creation of a new file and you have to manually reselect the language. I actually like this and treat it like a feature: new files start in "brainstorm mode" and only "earn" syntax highlighting once they are sufficiently mature, at which point the environment becomes more constrained. This kind of accidentally mirrors the behavior of CodeWarrior which I used to love for C++: before the age of running a daemon in a parallel process to syntax highlight, CodeWarrior would only "know" the classes and methods you defined on the last successful compile. This was simple and fairly bullet-proof: no need to clear any weird caches or anything, no crashing background thread trying to highlight incorrect code, new classes were unrecognized until you hit compile.
That being said, even if I programmed with the intent of continuing to be syntactically correct during the entire process (which I do when I am editing an existing file usually), I still cannot stand autocomplete, or really anything beyond simple syntax highlighting, because I feel like everything about today's computing experience is yelling at me. Notifications constantly popping up, linters yelling about stuff I don't care about yet, and autocomplete acting like clippy telling me every possible method that starts with an S. I find it severely distracting. I wouldn't want Microsoft Word to tell me every verb that starts with "s" just because it knows that in this position of the sentence I must be typing a verb and I just hit an "s".
That being said, even if I programmed with the intent of continuing to be syntactically correct during the entire process (which I do when I am editing an existing file usually), I still cannot stand autocomplete, or really anything beyond simple syntax highlighting, because I feel like everything about today's computing experience is yelling at me. Notifications constantly popping up, linters yelling about stuff I don't care about yet, and autocomplete acting like clippy telling me every possible method that starts with an S. I find it severely distracting. I wouldn't want Microsoft Word to tell me every verb that starts with "s" just because it knows that in this position of the sentence I must be typing a verb and I just hit an "s".