Is Dot better than any other coin that came out 7 years ago?
If you are asking the DOT supporters and i do believe if they will say that yes it is. I can't argue about that because ethereum already adopted by lots of parties as it's the oldest smartcontract although it's still having a lot of problem but it will be fixed in the next updates.
The question is are you seeing it from the how old the platform? why dont you try to see that from the various view just like the technical aspect of the platform?
that may give you the different opinion about that. The majority of new platforms have been making a lot of improvements from the problems that faced by the old protocol.