I wonder what the age starts to be once people realize that when you are an adult you don't get babied around and they hold your hand through the whole way

Your always gonna have to deal with douchebags who expect everything to be handed to them on a silver platter. I'm sorry OP :(

At least your boss told they were complaining and presumably isn't mad. Remember, as long as your boss likes you and you do a good job, it doesn't matter what they think.

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One time that happened to me.. unfortunately it got to me, and I quit. You can work through it, OP!

Ah good old fashion coworkers

Well that is kinda bullshit...

I feel like this is quite subjective. I mean from OP's point of view they could be being lazy and not need any help, but how do we know that they aren't falling behind through no fault of their own and the other manager helps them out when they need it and OP doesn't notice that need

They should be capable of doing their own damn jobs. That's such a childish, immature complaint.

So what if they complain about you? As long as your job is intact, they should be the only ones worried.