You did so many mistakes, and I think(just my opinion), that account cannot be saved anymore. If you want to be competitive, start fresh on a new server and follow every advice given by veteran players in this thread. Like you, I also did so many mistakes on my first account, and it was beyond salvation so I abandoned it. Im also an f2p like you, but on my new account, I got 70K+ BP at lvl 80. Start anew my friend.

HMinato is great with wind main. Throw in wind main, gaara, and kurenai. Much better if kurenai is skillbroken specially her chase to add more control on your team. She also adds protection and a chakra battery for your team.