Yeah, it's not as noisy and messy as Google's, it let's you folder messages by category and has a nice clean quiet interface designed for large displays. Google's tries to push and sell you on features every time you use it.
Sorry, what? Not sure if you're joking, but Americans use texts because they're free and the ability to use them comes preloaded on the phone (no need to download something that takes up more space). I have Signal and WhatsApp on my phone for my international friends, but I use texts to communicate with US friends because RCS works with everyone and it's integrated much better into my phone, watch, etc. than any app can be without an absurd amount of permissions given to the app.
I use Mezo SMS, comes with a wildcard blocklist for both numbers and content.
And to be honest, I use it exclusively to block shit. Haven't actually sent a text message in way over a decade. If it wasn't for two websites I have to use sending me one time passwords, I'd have uninstalled the SMS app altogether.
Sadly, its all I have for communicating with iPhone users. A few people in my family have installed Signal, and that's great, but my friends refuse to do so, and I don't blame them.