Could be your ping bro, check your server settings. High ping ruins everything. WiFi gamers take the biggest Ls here. Try using ethernet if you can.
Servers been acting up too, especially after big updates. Everyone hops on at once.
Crossplay lobbies sometimes spike lag, especially if people are on diff platforms.
Try lowering your settings too, less strain on your system. FPS drops hit hard during big fights.
Also background apps be stealing bandwidth. Close that Discord tab bruh.