It's not that the products are poor but that Intel has a long and proud tradition of killing any product that is not directly related to x86.

Intel GPU started with i740 (a stand-alone AGP card), which is the last stand-alone GPU they made... and that was 1998 or so.

Their networking chipsets were a result of Intel's own x86 motherboard business, especially in the server arena. Intel also bought out companies in the late 90s/early 2000s to build their stand-alone network appliance business (routers, firewalls, SSL accelerators, etc) only to prompt kill that off when x86 started stumbling thanks to the P4 and AMD's competition.