I am not a teacher.
Of course you don't. You never do.
It doesn't have anything to do with the error, it has everything to do with making the error obvious.
It was only a suggestion.
I stupidly thought that "I always show respect to you betters." would sound so wrong that the error would stand out.
I understand that but we native speakers frequently think that an error must sound really obvious to everyone, including learners. We are frequently wrong. What I don't understand is why you thought that "
I always show respect to you betters" somehow makes the error with "you" more obvious. Both sentences (with and without "I") have exactly the same error but completely different meanings. If the OP had realised that "you" was wrong, they would have corrected it in the first place.
However, we have drifted off track here. The fact is that most of the time, we encourage learners to work out what the error is themselves. This is one of the rare occasions when they were given the answer early on in a thread.
I fear our exchanges might well be confusing the OP more and more at this stage. In the absence of any response at all from the OP so far in this thread, we have no way of knowing yet whether it was a typo or an unspotted error.
Can I suggest we all hold fire now until we have heard from the OP?