To me it sound a bit... vulgar since I have unspeakable associations in other languages about this verb.
I saw that some of you ladies used. I do not understand the meaning of this phrase “ I keep getting told that I suck at languages.“ google is of no use.
Just as a little footnote, suck is so commonly used, and normally in a colloquial non-offensive way, that it has to make the list of one of the most-used English words there are, at least in its figurative sense. It’s so common, it reminds me a lot of the German Scheiße, or Scheiß-(with something added to it).
So, you can vulgarize the word easily, and people do all the time. Like you can say, “That’s a really suck-a s s situation.” I’ve heard that a thousand times. And, I’m sure Neal, Jerry and Susan have too. Of course it’s colloquial and bordering a little on the vulgar side, but very common. And there are other words its mixed up with too, to even make it more vulgar and still keep its figurative use.
And, I’ve noticed people do like to use it in combination. You could say, for example, “As a piano teacher she sucks.” But, a lot of people would just say “She’s a suck-ass piano teacher to spice it up a bit.
Maybe I’ve just hung around with too many crude people in my life, but I have heard that word used in combination more times than I can remember.