I just looked up your character. You have not cleared deep dungeon solo at all. There is your content. Get to work.
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Anywhere on Aether, Gilgamesh in particular.
People that really want to play a lot usually just spam PF though, it's difficult to find a true no-life static. The most active Ultimate raiders basically hang out in the ultimate pugging discords in my experience.
Honestly at this point it is gonna be harder to find groups for current savage tier (considering you haven't cleared it yet) seeing we're 24 days away from new expansion. You don't need to be on a FC to go for high end content and PF isn't as bad as some people make it sound.
There are a couple Discord servers you can look at to try and find a static for whatever content you're interested in, like UPR for ultimates.
The "sweaty tryhard guilds" are all on vacation because we're in end of expansion lull, not new game release like New World. The "sweaty tryhard no life people" either cleared all relevant content 6 months ago or gave up trying.
You're going to find most "sweaty tryhard no life people" in non-FC based statics. FCs are generally joined for social reasons not content progression. That means you only need to pick a data center, not a specific world. Aether has the "sweaty tryhard data center" reputation.
There are hardcore players on every server.
A "sweaty guild that run contents every day" isn't very common, because they would complete the content within days, get what they want, be done quickly and stop running it.
What people frequently do is form a static (7 friends) who do any new content together and these can be formed from people across worlds using CWLS and discord.
Zalera is the TryHard server for glam.
Nah, that's the good part of FFXIV. For those people who prefer the way New World does it, well, there's New World. People can choose the game they want, or even play multiples of them. The genre would be better off that way rather than having one game be the end all, be all.