For me, the worst currently are:
- Between you and I... (or any similar use of I in oblique positions)
- If I was a betting person... (or any similar failure to use the subjunctive)
- Attempts to make non-existent verbs out of nouns
For instance, - I see he could of rather than he could have.
I also do not care when people don't understand the difference between accept/except.
And lastly I am not a fan of misuse of apostrophes.
Your first two are interesting because they've only become problematic relatively recently, as written communication has surpassed verbal. The wrong and right sound the same, spoken.
If people would just remember what to do "when in doubt," they'd solve 90% of their apostrophe problems.
Edit: It strikes me I didn't really care about apostrophes before I was mostly reading people's words instead of hearing them, either
"The trophy problem has become extreme."