Of course! Easier said than done though for most people.
Well, honestly, I think it's hard for everyone that goes through it.
That's on top of other battles in life that never stops.
Only thing that worked for me personally is to first build the foundation of having a strong ass mind and then doing the little things that helps to supplement that. I think goggins tackles that well where he points out that there will always be a reason to fail if one depends on something other than their own strength. Like if you depend on a group, what if that group lets you down? You know, something like that.
Being past my 20's now, it was one hell of a ride and life's been a constant uphill, and it still is now. Thankfully, like most people, I've grown more self-sufficient at this stage (job, social life, life experience, etc...).
For those of you struggling out there, keep your head up bros! (And sisters).