There's your problem. You're Level 18 in the starter ship, which leaves you badly under-gunned and under-skilled for where you need to be. Equipment-wise you're not too bad, you're just lacking enough weapon slots and Bridge Officer seats for your level and the strength of your opponents.The Romulan Republic wrote: Last I saw I was at level 18
I'm in a heavily tinkered with Miranda class ship.
Look at this chart and you should be in a Tier 2 ship, while you're still flying a Tier 1. This is why things are going badly for you.
If you haven't already, you need to go see Admiral Quinn on Earth Spacedock about that promotion he's offering you so you can get a new ship to fly.