Not on topic but I have yet to see any AI that wins with TEC Loyalists.

Basically what Goa said. AI (especially higher difficulty ones) get massive advantages. The main weakness of AI is that while they know how to put a decent fleet together (I've found that often they will build large numbers of counters to whatever you have, though it is rarely an optimal fleet comp), they haven't got a clue how to micromanage it. They will simply send all their ships right into range of a Starbase  or other powerful unit instead of staying back and letting only units that can contribute to the fight go in close, like a good player would do. You can exploit that with a well managed fleet to inflict huge casualties on an AI with a relatively small fleet.

That said, Vicious AI are ridiculous, and it's possible that you may not be able to beat them at all, especially if there's more than one ganging up on you. There's a point where it simply becomes impossible to beat Vicious AI, I believe someone said in another thread it's like 3v1? At that point they can simply overwhelm you with sheer numbers and their obscene resource advantages, among other things. So, you may not be doing  something wrong, like Goa said.