Should you confront your manager about a colleague’s incompetence?

Send an email and CC your colleagues stating that all have same thoughts. Point out specific instances in the mail and showcase how it's affecting your bandwidth and morale. This way it's documented and inaction can be escalated.

What a sick fuck. Have a life

Do not get involved. Try to minimise your own additional work due to that colleague. In one-to-one meeting with manager, let the manager know. Use the words: I just wanted to bring your attention to one more matter. Then describe the challenges that you face. Not your team. Do not gang up, do not conspire or collaborate. Do not mention about how other colleagues feel the same way. If your manager takes a negative opinion of these activity, you'll be fucked, because such a thing would create a negative impression. If the manager is not inclined to go by your judgement of your colleague's competence, you'll lose face. But it's much easier to control the narrative and restore your manager's confidence in you in a one-on-one conversation, than when it's a group mutiny. No matter what others tell you, do not get encouraged. People often sound like they're with you, but they often are not. They won't back their statements, and you'll be alone holding the bag. And moreover, if you stay out of it, you'll be able to carry the high ground of being above the fray, out of politics, and being balanced. Don't do netagiri of this sort. Conserve it for initiatives for which getting consensus is harder. It might be possible that you're the only one feeling so strongly about it. Then you may be in need of a weekend, or someone to vent to, or even therapy. But get your hate in check.

If you're doing it. Do it with the whole team. And don't even dare sound like the ringleader. If everyone complains together, he'll be forced to give feedback to the truant coaster and next time he'll have a sharper eye on the dudes misgivings. If you complain alone, it won't have the same heft.

Don't clean up and babysit then

and why're you doing your manager's job for him?

Just bring it up casually in your 1-1s

First you have to talk with your colleague about what challenges they face to deliver the required work. Do not make it personal, try to understand the reasons and maybe help bring them up to speed so you won't have to babysit. You can also tell your manager the productivity hit you're taking while cleaning up the mess and request help in bringing the person up to speed. Focus should be on meeting team's goals and your own productivity not acting against a colleague

What you can do? Stop cleaning up the shit and babysitting. You can bring the same on 1on1 with manager. And try to present it like you don’t have the problem, overall its a problem. Passively put all the points, so you don’t seem like devils advocate. Never ever drop a mail or anything, don’t give the hint that you’re backed with others also. Manager should go and find out themselves.

This is so difficult situation to deal with. If you do it the odds are going to be against you.

What’s the equation between your manager and this colleague? It plays an important factor before you even politely quote him, let alone going all-out with the criticism.