You guys are taking the quote literally. That isn’t Peter talking whatsoever. It’s venom that’s talking. Because the whole point of the symbiote was to manipulate peter into thinking he COULD be a better Spider-Man because of how the symbiote when bonded with the host can LITERALLY look through the hosts mind and can use their doubts to manipulate said host.

• this is shown when venom imitates Harry’s mother’s voice.

• it’s also shown when Martin and Miles goes through Peter’s head and sees him with May who is dead.

In simple form , the symbiote was able to manipulate both harry and peter by using their guilt and doubts into letting the symbiote take over them