Most losses I reviewed this month were not decided by gunnery but by the first ninety seconds. Teams commit to a flank before the spotting picture exists, and by the time it does, disengaging costs more than pushing.
The habit of dropping cover for yourself rather than for the ship that actually needs it is the most common coordination failure I see in mid-tier matches. A short note on when not to use it.
Everyone repeats the advice to angle. Fewer people can say what angle. Here is the arithmetic, without the jargon, and where it stops being useful.