The controversy around clone brands
Page was owner of the patent only for Great Britain, allowing LEGO to use the design worldwide. Buying a "rival" company (Kiddicraft) later on is nothing unusual in business history. Therefore, blaming Page's death on LEGO does not make much sense. 

Regarding chinese brands, one has to make a difference between using a compatible plastic brick system (which everyone is allowed to do) and copying complete sets, including minifigs and the logo (which is illegal). Some clone brands create sets that LEGO fans would like to see not only as MOCs but as official LEGO sets. There is nothing wrong with compatible systems even if the quality often is lower than LEGO standards.

So, LEGO and Lepin cannot be compared in this way. Lepin is illegal, selling Lepin products is illegal.