I'm not parent commenter, but other than the occasional misconfigured internal work LAN webpage, I've had zero to little problems with UBO.
Is there an example of a site that is unreadable after a default install of UBO for you? I'd be curious to check it out..
>UBO doesn't mess it
Never had this issue. Even in Slack, where UBO blocks 778 elements atm.
It's just fine on actual websites. The only things it breaks are the single page app monstrosities (and the occasional crappy newspaper site) that I don't use anyway. It's very rare that I have to disable uBlock for anything.
On the otherhand I also run NoScript temp-whitelist only so all sites that rely on javascript are broken by default for me until I figure out which CDN/etc to temp whitelist.
Just curious. I am on a similar boat but sometimes find some sites to be unreadable after having UBO and some other privacy adjustments through about:config.
Thanks!