@zimowski well, in regards to the big corporations being gatekept, theres 20,000+ instances here and I'd say about 1-2k MIGHT block them. However a ton of instances have their blocklist private so the only known amount is around 800. They'll never be fully locked out due to the way the network is.
Yesterday, I even had a threads user take a screenshot and make his own post saying "Meta needs to hurry up, I wanna banter!" Because they cannot mention us directly yet. It was pretty neat, but they're working on it.
As for the official app being trash, what mobile device do you have, iOS or android? I can recommend some really good third party apps on each platform if you'd like. It may be a better experience for you.