Draft should be able to upgrade a team.
Actually it does. The better picks can be trained and in long term make your team stronger OR can be sold for higher amounts than older players with the same stats because those youngsters can be trained better.
It's your first season, it's time for you to start already making long term planning. Which positions you will train, which stats for how long.
It's too easy to demand better players in draft and expect draft itself will develop your team. It's your call to develop your team with the available opportunities.
Climbing the BB-mountain. Destination: the top.