It doesn't really matter if the app claims to use E2E when it actually discloses message content [0] [1]. WhatsApp is also filled with backdoors [2].
[0] https://therecord.media/fbi-document-shows-what-data-can-be-...
[1] https://www.rollingstone.com/politics/politics-features/what...
[2] https://telegra.ph/Why-Using-WhatsApp-Is-Dangerous-01-30-4