  The mechanism through which superconductivity is destroyed upon controlled
disordering often holds the key to understanding the mechanism of emergence of
superconductivity. Here we demonstrate an $in$-$situ$ mechanism to control the
fraction of disorder in a 2D superconductor. By controlling an electric field
V$_G$, we created an assembly of segregated superconducting nano-islands and
varied the inter-island distance to accomplish a quantum phase transition from
a superconducting phase to a strange quantum anomalous metallic (QAM) phase at
LaVO$_3$/SrTiO$_3$ interfaces. In the QAM phase, the resistivity dropped below
a critical temperature (T$_{CM}$) as if the system was approaching
superconductivity, and then saturated, indicating the destruction of global
phase coherence and the emergence of a phase where metal-like transport of
Bosons (a Bose metal) becomes a possibility. The unprecedented control over the
island size is obtained through the control of nanometer scale ferroelectric
domains formed in the SrTiO$_3$ side of the interface due to a low-temperature
structural phase transition.
