This issue also occurs on the Windows launcher, using a fresh Windows 10 install and a fresh Minecraft Java install. In my opinion the default should be the "Latest release" not the latest snapshot.
This issue still occurs on my 2017 iMac Pro w/Vega 64 running 10.14.5 (18F132) on both the latest release 1.14.3 and 1.14.4-pre5
...pretty unplayable
This issue also occurs on the Windows launcher, using a fresh Windows 10 install and a fresh Minecraft Java install. In my opinion the default should be the "Latest release" not the latest snapshot.