Polygon has many problems and with many weaknesses. Their developer teams must do load of things to improve their blockchains before actually are able to compete with Ethereum or Binance Smart Chain.
Don't believe in their promise, let's see how they release products, upgrades to improve Polygon.
Polygon looks more decentralized than Binance Smart Chain. Polygon cannot compete with Ethereum because it is part of its ecosystem. The more success Polygon has, the more success Ethereum has. Binance Smart Chain is a fully centralized blockchain with 21 centralized validators.