I’m not an expert, but speaking from my own experience doing the FCC curriculum, interviewing for jobs, and in general teaching myself, there’s a LOT to learn even if you’re just focusing on front-end development. I’d also agree with the interviewer—your post wasn’t very specific about how much of the FCC curriculum that you’ve completed, but if you’ve been in it for 2 months, that’s not really long enough to be job-ready yet. Although for an internship, that might be different, but even then, 2 months still feels short.
If you’re not at that point yet, I’d suggest building more projects until you know how to do that. Then you’ll certainly be ready for at least an internship at most companies! Just stick to it and keep going at it, and remember that you have to be in this for the long haul. There’s no short, easy path towards learning web development.