Hi,
this in deed is a "well-known problem". As the game gives big advantage to long term gamers, for newcommers it is difficult to enter higher claims/ higher leagues. Just take the long term benefits of the arena as well as the long term benefits of the infrastructure. A newcommer (btw. me, in terms of BB I am a newcommer) does not have these benefits. Thus, no additional income out of the infrastructure, thus financial disadvantage compared to the long term gamers. To close this gap is nearly impossible.
You need time and patience - muuuch time and muuuuch patience. In fact you have this situation as described by you in every country/ every league.
One possibility is, when a long term manager gives up the game (scenario that in fact we do not want). However, in this case a "newer" team might have the chance to take that place. Other possibility is very long term development. For this you need - exactly - time and patience :)