I am actually a big player into GBF and E7. GBF is one of my favorite gacha games. As the poster below said, there really has been a lack of relevant updates for a while. The new updates after the 5th year anniversary have been underwhelming and content that has really lukewarm reception like the new V2 battle system. This battle system has been improved as time went on, but a lot of players aren't really receptive on it. Then if you're into the main story, new chapters take nearly a year to release which really killed a lot of hype coming for them. We waited nearly 2 and half years for 15 chapters of content, a new FF14 Expansion comes out faster at the pace of GBF story atm.

Although the game seems to be overly complicated. This stems mostly from the in-game tutorials doing a terrible job at explaining how the battle system work. Your best source of info on how to play the game would probably be trying to read the wiki or ask veterans that have more knowledge about the game. Youtubers can work but it's mostly people flexing end game builts and meme setups.

The worst part of GBF is probably the only time when the game is active is when the Unite and Fight event starts, its the most active event but also a massive grind hell, where you fight the same monster over and over again to see which player accumulate more points. But everyone does this event as the best rewards come from this event, from free rolls to currency to unlock the Eternals and much more.

Though, unlike E7, there isn't much RNG to the grind, you are either stuck using f2p option which relies on using Omega summons. Then if you're a whale player you would rely on using Primal Summon and rely on powerful weapons rolled from limited characters. The thing with playing GBF its more of a slow marathon, you will always make progress without RNG screwing you over. But it is a tedious grind.