There are any number of "artisan" oyster sauces around,, many of them excellent. Unfortunately (or maybe not) the majority are very small scale and only made in limited amounts. Same with anything genuinely artisan.
Lee Kum Kee doesn't come anywhere to those. They are much better options.
LKK is a massive industrial company churning out around 300 different products in multiple factories, mostly in mainland China, although their HQ is in Hong Kong. Most of their output is exported. They don't have a good reputation where they are made.
They do say they invented oyster sauce, but many companies have improved it dramatically. That said, oyster sauce isn't used in most Chinese food in China. Largely Cantonese.
