I agree with the person that says "everything Atlassian", overall it's probably not the worst, but the Confluence WYSIWYG editor has to be one of the most irritating pieces of junk I've ever used. Literally nothing it does is predictable.
Similarly, whomever said Signal has a good point… it never manages to download MMSs for me (which isn't its fault, signal is bad in my house), but it alerts me anyways so I get a stupid "this couldn't be downloaded message" that I have to be distracted by instead of only notifying me when I move into a place where I have good enough signal to download it. It also then says "tap here to retry" but does nothing when I do so (not even an indication that it's working or that I tapped it). Aside from the annoying notifications about messages I can't even read, it tries to make you spread it to your friends and you have to manually close the stupid "Tell this person about signal" thing for everysingleperson you open a chat with. I had to just go back to another SMS app and lose the ability to use their protocol.
The worst though for me is probably pulseaudio (still, after all these years, even though it's gotten a ton better). People knowledgeable about it love to tell me that it's obviously a configuration problem on my part, but every time I start my computer something else is wrong. Every time I plug in my midi controller and start up a synth I have no idea if it will work or not, but it also fails in a different way almost every time. If I turn on a bluetooth device, the device itself mostly connects fine, but then how the audio is routed just seems random. That one works most of the time, but not always, and if I turn the device off my audio settings sometimes go back to whatever they were before, but sometimes I randomly find I no longer have a microphone, etc. everything about it just feels bad.
Similarly, whomever said Signal has a good point… it never manages to download MMSs for me (which isn't its fault, signal is bad in my house), but it alerts me anyways so I get a stupid "this couldn't be downloaded message" that I have to be distracted by instead of only notifying me when I move into a place where I have good enough signal to download it. It also then says "tap here to retry" but does nothing when I do so (not even an indication that it's working or that I tapped it). Aside from the annoying notifications about messages I can't even read, it tries to make you spread it to your friends and you have to manually close the stupid "Tell this person about signal" thing for every single person you open a chat with. I had to just go back to another SMS app and lose the ability to use their protocol.
The worst though for me is probably pulseaudio (still, after all these years, even though it's gotten a ton better). People knowledgeable about it love to tell me that it's obviously a configuration problem on my part, but every time I start my computer something else is wrong. Every time I plug in my midi controller and start up a synth I have no idea if it will work or not, but it also fails in a different way almost every time. If I turn on a bluetooth device, the device itself mostly connects fine, but then how the audio is routed just seems random. That one works most of the time, but not always, and if I turn the device off my audio settings sometimes go back to whatever they were before, but sometimes I randomly find I no longer have a microphone, etc. everything about it just feels bad.