I made a post a few days ago asking your opinion on Manjaro and it was very mixed, with a slightly negative overall opinion. I heard some recommend EndeavourOS instead and did some online research and it seems to be pretty solid and not have the repository problem that Manjaro has.
Just for context I am a Linux noob and have only used Mint for about the past six months. While I don't have any major complaints, I am looking to explore more distros and the Arch repository with its rolling releases. I am not a huge fan of how certain packages on apt are a few years old and outdated. However, I also don't have the time to be always configuring my OS and just want something that works well out of the box.
Is EndeavourOS a solid choice?
EndevourOS is excellent. It has been very stable for me. It is easy to install. Your problem will not be out of date packages for sure.
That said:
If either of those things bother you, they may be a problem.
Updating packages is reliable and painless but a chore you need to get in the habit of doing. I suspect you would get more problems if you let it go too long. On the upside, as it is a rolling release, you never have an “upgrade” to go through.