Any particular reasoning behind all these, or you just got some skill issues and can't cope about it so you decided to post it with no further information as to why these things should change.
Also let me tell you, Oda might be the strongest hero, however he is not omnipotent, he can be shut down so easily he becomes almost useless in many cases.
Nobody said score is a definite measurement of how strong someone is, also when you're on the defending side, you're always on disadvantage because the enemy that is attacking can place their formation in a way which provides them better chances to win and also lock out some of your heroes.
How is GvG unfair, it's random who you get.
Clicking one button to upgrade your heroes is a thing we've asked many times in the past, you're better off go typing that in #🤩┋new-contents as a feedback, and in a friendlier manner.
The game has become more p2w yeah, but it's not like f2ps don't get anything out of it, the only thing they should boost for f2p is the available ISS and pure essences they have in their disposal imo, it's really gate keeping them a lot.