why is English so incomprehensive compared to other languages?

Don't you mean "incomprehensible"?

The English language can be very confusing to a non-speaker. For example the word LIVE. It can 2 different pronunciations and several different meanings depending on context of use. Yet it retains the same spelling. 

English is so incomprehensive .......

Is/Was Donald Trump the 45th president of the US? This is an interrogative. Ends in question mark. To answer your question about interrogatives.

It not hard. Though English uses a lot of prepositions compared to other languages.    I am, You are. Instead of Spanish

Soy, Ested.

I always felt Cantonese was the hardest language to understand. It's tonal, so one word (or even one syllable) can have multiple meanings depending on the pitch at which it's spoken, and the sentence structure is nothing at all like English (or many other languages). 

But I made a number of friends of various Asian ethnicities back when I was stationed in Hawaii, and many of them said English was the most difficult language to learn mostly because of the slang and things like certain figures of speech and colloquialisms. It wasn't so much one word having different meanings, because the meaning could be inferred from context.

Hmm... like Irish, which TOTALLY makes sense? "Dun Laoghaire" obviously sounds like "Dun Leary", you pillock.

All languages are said to be adequate for what needs to be expressed.  There are some things which are easier to say in some languages than others, for instance English has only one word for "you" and one for "we".

As for the interrogative, it's just "Was Donald Trump the forty-fifth President of the US?"  It's like that in lots of other languages too.

A language cannot be incomprehensive, but people can.

You just did.  But here is another one:

Was Trump the 45th President? or:  Was the 45th President Donald Trump?

or:  Who was the 45th President?

incomprehensive  ---- that word doesn't mean what you think it does.