Boring...slow? Have you ever seen a race on tv...like DTM or something? These are not F1 cars. Even those look "slow" from different camera point, but from in the car it it's totally different.
Jep boring and slow...same as real races:
The camera in GT Sport follows the car most of the time. That's different like the fixed cameras in this video. There is also a difference between playing offline or online against other players.
Forza Motorsports is not bigger then GT Sports. Last Motorsports game released in 2017 and it really the least popular Motorsports game, so not it's not crazy..it's a fact that GT Sports is way more popular then MotorSports. Horizon didn't help the Motorsports franchise to be more popular, in fact, it made people almost forgot that they also released another game with the Forza name in it.
You can't really come with the excuse because of Horizon, not really comparable with GT Sports. Why not compare Horizon also with other sim races? Why only with GT Sports?