I don’t have any empirical evidence for you on this topic, but in my opinion yes, I think some people are - especially with oral language adaptation. And I think I’m one of them too.

I’ve tried learning French on and off for most of my life. Did it in school for several years, got a French tutor who helped me scrape by with a C in it, spent a few years with it on Duo Lingo (I know I know, that so is far from perfect), spent time watching French news. And after all that I’d say my French language skills aren’t even closer to a conversational level. I especially struggle with the oral side of the language, even though multiple teachers have told me I have a good jack for pronunciation.

I haven’t lived there, so maybe that would push my over the edge? But I don’t know. I think I’m in the same boat as you.

The language your are learning also factors in. I’ve also tried learning Spanish and have found that easier. Meanwhile, I tried learning Mandarin and was completely lost. And English is often described as being ready to learn at as basic level but difficult to master. It’s such a relatively unstructured language with so many weird exceptions.

But with all that said, don’t give up! It might just take longer for the oral part to lock in. And your written English is excellent.