You make a good point about a lack of ideas in modern gaming. I think one of the reasons for that is its become easier to make a game. There are even game making tools, or programmes that don't require you to actually write gaming code. Gaming as become more dialuted over the years as the casual gamer as taken over the gaming audience.
There is also a cultural shift in gamers attitudes too. Back in the day we wanted to set the highscore on a game. Get all the trophy's. Though there are still people like that, the vast majority these days seem to want to cheat games by hacking them.
I play the Grand Theft Auto series. I've played it from GTA 1. I regularly play online with GTA 5, and like the racing part of the game. I'm mostly playing against random people. I've found most people will try and bump me off the road than try and win the race properly. Some even will start driving backwards on the course just to cause as much mayhem as possible. It is a rare thing when I notice someone in the race who is going out of his way to NOT crash in to me.
I think another shift in gamers is age too. When we were gaming we weren't babies. I'm 38 now and got my first computer at 12 years old. But starting in the 90s 2 and 3 year olds have been playing games. I remember years ago a friend was looking after his grandson and he was letting him play Doom, and the kid, who was only about 4 or 5 was killing everything!.. thats another thing, in these deathmatches you can get your butt handed to you by a 'a squeaker'.
Urban dictionary.
A squeaker is a child on an online voice chat that has not yet reached puberty. The squeaker will talk in an extremely loud voice, to the point of the audio level needing to be turned down for the comfort of the listener. The squeaker is infamous for using execcive profaity on voice chat, inserting a swear word in nearly every sentence, as they think it will make the older boys think he is cool. The other kind of squeaker is the sex obsessed squeaker who is in the middle of puberty, and will constantly talk about sexual acts that he has ever done, and will use nothing but sexual terms to insult other players.
Most of the new and original ideas come from smaller games programmers. The big companies rarely introduce new ideas. They will churn out similar games in series, Battlefield, Call of Duty etc.