You honestly don’t notice this? It’s not conjecture that mainstream gaming outlet routinely ignore and diminish Sega’s contributions to the industry. Just look at IGN’s recent “Top 100 Games of All Time” list. Not a single Sega game. No Daytona USA, no Sega Rally, no Sonic 3 & Knuckles, no Space Harrier, no Virtua Fighter, no Shining Force, no House of the Dead, no Phantasy Star, no Panzer Dragoon Saga, etc.
https://www.ign.com/lists/top-100-games
Call me crazy, but I think for this to happen you need to be either incredibly ignorant of the industry you’re presenting yourself as an expert of or you need to actively dislike the company.