It could be those avatars of annoying fictional characters telling you 'well done' or 'watch the video' when the buggy physics has something to do with your car oversteering off the track at random throttle positions whilst trying to get gold.Out of interest, what is it about GT7 that you dislike compared to the last couple of releases? Is it just the lack of single player content?
It could be the cafe single player mode, where some friendly Italian gent (behind the friendly mask he's actually a mob-connected puppet master in the GT universe) sends you on horrid missions to collect cars that you don't want while racing in cars that you don't like at all.
It could be the whole griding / credit earning experience ...
- "Hello sir, welcome to Haggety ... well sir, if you have to ask how much sir, you clearly cannot afford it..."
- 30 x 700 pp races (starting at 20th place) later "Hello sir, welcome to Haggety... well sir, if you have to ask how much sir, you clearly cannot afford it..."
It could be the wasted disk space and compute resource of the Music Rally ...
It could be the daft AI, braking mid-corner, backmarking cars not moving out your way, deathrace 3000 driving style of the top 3 cars in a single player race.
It could be (when the above daft AI) knocks you onto the gravel/grass or wall, that the 'invisible hand' will grab hold of your car and move it AWAY from the direction you need to get back on the track. And no amount of steering or pedal input from your wheel/DS controller can influence the motion of the car for atleast 15 seconds.
It could be the rather worrying feeling of the impending sophy AI being forced into a later update of GT7, cue the need for larger hard drive if you own a PS4 and drop to 18 fps to support it.
Just a few guesses...