When using a VPN, an attacker can also break your anonymity by monitoring the incoming and outgoing connections of the few servers of the VPN. On the other hand, the Tor network is formed by over 7500 relays run worldwide by volunteers.
Tor is the anonymity network with the largest user base. More than 4 000 000 users connected to Tor daily in 2023. Being adopted by such a large audience proves its maturity, stability, and usability.