Is this a nationalist song, saying "Russia is the only real unique country" or "Russia is better than all this 'Нероссия'" or is he just expressing his wonder at all the countries and languages of the world and how they're strange and unexplored to him, and how exotic the outside world is when you only know one country?
I deem it’s a patriotic song with a tint of masochism. Its main message can be interpreted as ‘I love Russia no matter how hard conditions and everything else out there may be.’ Patriotism is mostly irrational.

Пять шестых – суша, огромная сверхдержава,
Хорошего, похоже, не желающая ни шиша нам.
...
Странная область, и мне приятна эта подробность.
Я получаю удовольствие от этой маленькой детали,
It’s similar to Lermontov’s famous lines “Но я люблю - за что, не знаю сам“, but the lyrics is way worse.

Лермонтов:Родина