If that's the new player experience, you done fucked up. Making sure new players actually have fun is a critical part of the game's design. You can't just rely on "...and then new players will have to spend 50-60 hours getting demolished before they start having a good time."
Easing that transition could mean different things -- a campaign, skirmish mode vs bots, full-on PvE co-op mode, automatching that actually works, whatever -- but you do need something effective.
Bots can teach basics, but many of these games rely on abusing game mechanics in ways the developers didn't think of in development so it's impossible to teach. Or things are physically difficult to pull off.
Movement shooters especially have this problem because a core part of the game is abusing the movement system and abilities to out maneuver other players. You can explain the how, but executing it all automatically is a real skill that requires practice. I adore Titanfall 2. I sunk hundreds of hours into it. It's really something else when you get the movement down, it all happens so fast you can't think about it you just have to do it. There's no way to teach that with a tutorial, it's muscle memory and perseverance.
Titanfall 2 has all of these things, campaign, skirmish with bots and PvE, but the skill floor and ceiling is still brutal. Whether it failed or not is a question of how long you expected the game to last, but it still succumbed to the same fate. The more experienced players pulled the ladder up behind them and the matchmaker didn't have enough players to give everyone a fair match.