Some sites are bad but I use them so little that they don't matter. For instance, USAA shipped my 529 to another company and their site is trash. It's heavy and broken. I login once a month though, so it doesn't matter much.

Slack and GMail I have open all the time. Slack is by far the worst of the two but they both consume a ton of resources. I'd probably be more annoyed by GMail if the UX was as bad as Slack though.

Then there's any atlassian product. Slow, confusing, constantly changing for the worse. There was a time in my life when I used both daily and they weren't that bad. Now I use a slack bot to interact with jira and and make one edit in confluence a day (for a standup and it takes about three minutes to edit, update and save).

And reddit... If I had to rely on that daily I'd probably rage quit the internet. I still use the old interface for most things. It's ugly but it's not a dumpster fire of slow loading API calls to render bloat.