WhatsApp probably has bugs like these discovered on a monthly basis, that we never even hear about.
The only time we hear about bugs with non OS software is when there is a masssive breach, FB initially reveals it only affects a small number of people, a few weeks later quietly revised that to a few 10s of million, and then a couple of months later buried somewhere that it was actually hundreds of millions of users affected.
Right-clicking the heart button and clicking "block element" is much easier and faster than downloading an extension, reviewing its code, then overriding whatever safeguards Chrome has to make it hard to install 3rd party extensions. Just my two cents.
On the new Twitter PWA, you can just switch from "Home" to "Latest Tweets", though it has a habit of automatically switching back once in a while. Also, they use React with obfuscated class names that change whenever they update the site so customizing the appearance (e.g. hiding the like button) is pretty hard to do.
Most people use social media not with the intention of shouting into the void, but with the intention of getting replies that they want to read, that they then do read, and perhaps reply in turn.
If that's what usually happens, but sometimes randomly they get tons and tons of replies that they don't want (as claimed by this post), that's an interesting and noteworthy flaw that I've never seen specifically discussed.
You can also mute notifications from people who don't follow you / who you don't follow, though it may not be desirable to keep it like that all the time.
