in a poor manner or way:
The team played poorly.
in poor health; somewhat ill:
I hear she's been poorly.
That's very strange, because I though that "poorly" was always an adverb. It seems to me specific to the English language, because I can't find other examples. Or should they say that it's an adverb, but can be used to relate to the subject, as a "copular" adverb?
There are dialects of English (mostly in the UK) where forms such as "poorly" have taken on an adjectival use. That is definitely the copula, and it is definitely an adjective.
There are dialects of English (mostly in the USA) where seemingly adjectival forms have taken on an adverbial use. https://www.youtube.com/watch?v=7epnfcHy5SA
"Feel" can act as a copular verb (linking verb) in English. So, an adjective is OK here.
I feel fine.
I feel happy.
The vast majority of the time a primary source document won't use "Ego" at all, as it's only used to emphasize the subject. So no worries there.
Ego is nominitive, and used only as the subject. In English, if you'd say "I" use "ego" in Latin. (Or don't use it at all.)
"Me" is accusative and ablative, and used as a direct object and object of a preposition. If you'd say "me" in English, use "me" in Latin.
The flag button used to work well but lately I've found it less responsive. I don't know whether this is a device issue, or a change in the interface design, but it does eventually work for me. It might need holding down, or it might just need time. I haven't figured out which. Maybe one or both of these possibilities will work for you.