I have the same issue, you can slow down the pointer speed by copy and pasting this into a terminal
xset m 3/2 5
How it works
from man xset
mouse The m option controls the mouse parameters; it may be abbreviated to 'm'. Of course, it applies to most pointing devices, not just
mice. The parameters for the pointing device are `acceleration' and `threshold'. The acceleration can be specified as an integer,
or as a simple fraction. Threshold is just an integer. The setting is applied to all connected pointing devices. xinput(1) should
be used if you need device-specific settings.