Hey...Vikings have had to purge old talent and bottom out a bit while playing young guys too. Just, they had a bit more talent to expedite things than the Browns had, and which obviously allowed them to win a few more games in the process.
But I don't think the Browns are that far off. I think you've got the foundation for both a good offense and good defense, considering the first things you want to build up are the fronts (OL, front 7) before throwing in young guys in the tough positions (QB, WR, CB), and I think you've accomplished that. Just, those last 3 position groups are what push you over the top in the current NFL, and they're also the hardest position group to hit on.
Real question is, do you trust the people in charge to identify the right QB to move forward with, good WRs who fit the system, or good CBs who fit the system? That, I honestly have no idea about.
But when you are very young, and not loaded with established talent, you want to see flashes or progression of what your groups could be. I think you guys got a good flash of what could be last week defensively vs Tennessee, which would have me excited to see that group healthy again.