The first time I used it around 2007 I thought it was great. It was basic, but did everything that I wanted ( I’d didn’t care about the project management that maybe didn’t even exist back then I don’t remember ).
I think that it’s been diverted from its original purpose,and is now indeed horribly complicated since it’s supposed to be all in one package.
I’ve also noted that in large companies the quality of the product for end users, as long as it’s not a massive drag on productivity or on recruitment and is not core business, is irrelevant and that other factors are more important ( costs, contracts , easy to install integrate and maintain, quality of support, breadth of use within the company etc ). This makes atlassian a natural superpower.