I would say there's a strong negative bias on SEGA formed in America, were the market traditionally inclined to Nintendo. Likewise European markets are strongly attached to SEGA/Sony brands, this is why both corporations performed best in Europe even in their worst years.
There is also, of course, British bias that works in SEGA's favour. Sonic's popularity has dipped but his best review scores tend to be found from the English press (The best review scores for Sonic 4 and Generations I saw tended to be from British outlets.) likewise developers like The Creative Assembly got major press coverage from gaming magazines like EDGE to mainstream sites like of the BBC, the Guardian etc because they were a British developer.
My point is... There's positive and negative bias everywhere for SEGA, Sony, Nintendo etc but each circumstance is different.
Mobile gaming is an inherently different platform to consoles and PC, we are not going to see the same types of games that we would have seen on those platforms. For me, and most Sega fans that's not a good thing at all. I also, probably like many gamers, have little interest in phone games because it's rare for me to play them, let alone pay money for them.
I can see why this would be seen as a negative by most gamers.
Most gamers are negative about mobile in general. But this is the very same group that wanted casuals out of the industry and motion controls to die.
And that happened. And then the industry started to collapse.
I think mobile will get better along the way, I'm hoping stuff like Total War Kingdoms is successful for that reason, pay once and enjoy. What they could charge is cosmetic items, I'm not sure what without scaring of the fanbase, but it'd be a good way of getting further money from the base game without disrupting the gameplay.
I excluded Alien because it probably got very positive press for being a good game. Did articles about this game also include negative points about Sega? Genuine question, as I said, I rarely read any gaming articles these days so wouldn't know. Having said that, Alien is probably the only game released last year from Sega I had interest in buying (Bayonetta 2 being a Nintendo game in my opinion) so I can't say I disagree with Sega's output being 'mostly mediocre' these days, or at least not appealing to me.
Some did open up with SEGA and Colonial Marines but most ended up being extremely excited by the game. It makes sense in terms of the recent context.
What made no sense is saying how Sonic Racing 2 might be doomed because Sonic has been struggling recently (That would be true if it was for the original but Racing Transformed came out after 3 good games.)