The general public tends to make snap impressions. Even if this was how a CVC looked on a real tanker, people weren’t looking at them side by side. The photo op was a very transparent attempt to “look tough” by someone who simply didn’t, and probably shouldn’t have tried to do so.
That aside, his liner at least does seem about a size too large. The liner is massive and because of that, the CVC shell’s lip is about even with the top of his head. As opposed to a properly fitting CVC, the lip of the shell just about touching the top of the eyebrows: