I'm a big Final Fantasy fan. Which means that most of the games I hate are Final Fantasy.
Final Fantasy VII Rebirth is worse than Final Fantasy VII Remake which worse than the original. It's a long story if you never grew up playing the original game or haven't played the remakes but it essentially comes down to SquareEnix's direction of the franchise. They have been running into this problem since around Final Fantasy XIII, though you could argue it started earlier. The producers at SQEX believe that Final Fantasy is the best series in the world so they need to invest all the time and money they can into the franchise. However, the producers are constantly arguing about just what makes Final Fantasy so good. Because of that, instead of following one direction to make a solid 8/10 or 9/10 game, they end up wasting millions of dollars and a decade and a half to make a 6/10 game that they treat as an absolute failure since it didn't sell 10,000,000 copies in the first month.
The shift from FFVII Remake to Rebirth shows this. The game has new gameplay like combat mechanics and world exploration that weren't there in Remake. At the same time, they remove or completely retool features like weapon upgrades and Fort Condor. All of these problems are because they never even agreed on anything and already released the first game in the trilogy.
Final Fantasy XIV Vanilla is also a great example of SQEX's problem.
Some guy argued that the best part about Final Fantasy is the graphics. So they made a MMO that couldn't be played on anything but high end computers. The world design suffered immensely because of this. Some other guy said that it should be just like FFXI so it was just like it even down to the outdated controls and UI. There are dozens of instances like this in the 1.0 release.
It was only when the strapped the majority of the game and did under the direction of one guy, Naoki Yoshida, that it became the beloved MMO it is today.
In general, what I am trying to say is that Final Fantasy sucks because SquareEnix sucks. I hope the series producers realize that Final Fantasy can ultimately be anything as long as it is fun. FFVII Remake and Rebirth, XIV, XV, and XVI have all suffered due to mismanagement and deserved to be treated like the so-so games that they are/were.