Why Generation 1 show had only 98 episodes?

I just realized that the TF Generation 1 cartoon had just 98 episodes, why only just 3 and a half seasons? I thought since the writers and creators brought back Optimus Prime back to the show after his supposid death from Transformers the Movie (1986) fans of TF will be exicted and would rush back and watch the series. Other famous cartoons like The Real Ghostbusters (have 147 episodes/7 seasons), He-Man and the masters of the universe (130 episodes/2 seasons) and Teenage Mutant Ninja Turtles (193 episodes/10 seasons) had more than 98 episodes. No doubt TF Generation 1 had developed a cult following.
Why in hell did the creators/writers cancelled Generation 1 after bringing back Optimus and with season 4 having just 3 episodes which all entitled "The Rebirth"?
Was it budget problems, ratings wise or writers couldn't come up with good ideas?
I would like to see Generation 1 end on a good note instead of the Rebirth episodes.
Why in hell did the creators/writers cancelled Generation 1 after bringing back Optimus and with season 4 having just 3 episodes which all entitled "The Rebirth"?
Was it budget problems, ratings wise or writers couldn't come up with good ideas?
I would like to see Generation 1 end on a good note instead of the Rebirth episodes.