This is a thing an adult should really know about himself: that he is a poor speller, and if a word processor is not highlighting spelling errors as he types, then perhaps that particular program does not do the little red squiggly lines.
"im" is not an acceptable substitute for "I'm" in written English. Proper nouns should be capitalized. There is a difference between you're and your, and they're/their/there. Commas should separate independent clauses.
I blame the schools and college he attended for not bothering to actually teach him how to spell, capitalize, and punctuate, and instead allowing him to rely on a computer to do all those tasks.