Lacking features is not always a bad thing. I am much happier with github issues than Jira.
And a good PM is to Jira as lipstick is to a pig. It might give the pig redder lips, but that won't make anyone want to kiss it. Even with the best PM Jira still had severe usability issues and bugs that atlassian shows no interest in fixing.
I think calling Atlassian mediocre is a bit generous. Confluence is a steaming pile of burn garbage that still can't get basic thing's like SVG working[1]. Atlassian can't give a darn, they have their captive market and they are just riding the gravy train now. The last good thing they did seems to be to buy trello, but they will likely turn it into garbage if the rest of their portfolio is any indication of what to expect.
And a good PM is to Jira as lipstick is to a pig. It might give the pig redder lips, but that won't make anyone want to kiss it. Even with the best PM Jira still had severe usability issues and bugs that atlassian shows no interest in fixing.