Can't really agree with that. For me, LastPass is a huge annoyance (it wants to fill in passwords on pages that these passwords definitely don't belong to, and it prompts you to save passwords over and over again with no "don't save passwords on this page" checkbox), and its UI is not really good either (e.g. the floating "+" icon in the vault - if you want to create a new folder you have to hover over it, for other items, you have to click it. Also, neither of these functions is available in the context menu - huh?!). And don't get me started about the "feature" of letting users use passwords, but not see them - security by obscurity anyone?
It's as much as a pain as you make it. For me if I keep it well organized I basically just forget that I have to login to things at work, I just click them and I'm in or I navigate and it's filled.
I can see how it might not be the solution you want for home but at work I'm just trying to get things done and that unfortunately involves a large number of passwords that can't easily be federated into an SSO like okta because they span businesses clients and companies. I don't understand the hate for LastPass, for me it just works (tm)
I think the hate mostly comes out of being forced to use a solution and then being annoyed because it tries to force itself onto you. Yes, I confess, when I'm waiting for an important email I sometimes check private emails on my work laptop, and I would love to be able to just tell LastPass to not prompt me to save the credentials for my email provider into my company account, but it's simply not possible, and then the repeated "helpful" save password prompts annoy the hell out of me...