I'm a heavy user of Twitter. They have the most ridiculous bugs all the time

Let me list a few I can remind in recent two years:

1. A serious bug that makes the private lists' name, member count, and description visible to everyone for half a way

2. ANOTHER private list exposure bug after a year

3. Lots of their features are semi- or totally broken, the most obvious example being Moments. Some minor ones are like "twitter anniversary" etc.

4. Media files being totally lost/404, especially for some older tweets

5. UI: "Checked" mark for adding people to lists being invisible for at least a week

5.1. UI: some UI elements suddenly become black for a few weeks regardless what theme you use

6. Outage: Like function broken for almost a day

7. Outage: Timeline broken (no update) for half day

8. This probably isn't a bug but a "shadow block" feature, but I can't follow some accounts (and their following/follower count doesn't show) if my IP is in certain region.

9. Huge feature disparity between web and app, or iOS and Android

And needless to say, their support is beyond unhelpful, and they don't really have a proper place to report technical issues/bugs of their service.