A very common cognitive bias or logic pattern our brain follows is to whitelist or blacklist things. When we trust something, we follow it without question or we begin rationalizing it no matter what. And in the day of the internet and Google we can confirm basically any bias we have on either side of an issue.
You should scrutinize your own thoughts and opinions and others to see if they are just believing something because it was true in the past.
In terms of Javascript, there is definitely a lot of hate out there for the language and ecosystem which was entirely true. But I would argue JS has the best trajectory right now of any language out there. So you better learn it if you want to stay relevant in development.
Lastly, I've found it best to not be so opinionated about everything. Sure having some opinions are great but you develop too many biases otherwise. So what if something sucks, use it anyway. You might learn something new, or maybe you can help improve it if it has potential.