How do you console a pedant?
There, their, they're.
The English langauge is a man-trap. I'm lucky that I was taught the basics well as a child, and was able to grasp them. At the time, I sneered at those who didn't, but when I was older - particularly at university (same one as you, (2:2 Honours - oh the shame....!), I sat alongside people who also struggled with grammar, punctuation and spelling but had utterly brilliant minds that put mine way in the shade.I may be a teacher but I'm also Dyslexic. Struggled with it all my life. However, I have learned how to cope with it and developed strategies to stop it hindering my progress, firstly through school (I was in bottom set English class all way through school but still achieved my O level and Higher), University (2:1 honours) and now in my working life teaching kids. As you will see, one thing I still never get right is apostrophes. Most other things I have learned wee rhymes to remember grammar rules or how to spell certain, difficult to me words.
People who either can't or won't pronounce th in a word, example
Fursday, the day after Wednesday apparently.
Baff, a large receptacle for bathing in.
Free, the number after two.
Wiff, accompanied by or having/possessing something.
There are many more, it really does make you wonder?