It's all just slow and mediocre. The Windows desktop client is a massive almost 400MB-download behemoth (and is electron-based), and if you have SSH keys you want to store in it you have no choice but to use it. Oh and you can't log into the browser extension automatically from the desktop client.
Admittedly the mobile clients have since been rewritten to be native (they were _really_ slow before), but Keyguard is still much faster/lighter.
I started using 1Password at work and it's just a.. nicer experience? It does all this and more. Everything is fast, the browser extension is more proactive/recognises fields better (Bitwarden can't really do multi step logins), and the desktop client isn't a chore to use.
The best comparison I would give is comparing Immich and Jellyfin (if you've used these), they are miles apart in terms of end user experience/polish/efficient design. One is engineered, the other feels like it's been hacked together by hobbyists.
Same goes for the bitwarden cli (`bw`). Its super slow and if you use it in scripts to pull multiple values (username, password), it takes ages. I personally switched to rbw (https://github.com/doy/rbw) and its day and night.