Lol, why lost? He said few posts after yours that's all psychological. That's why I said he's right since ships with similar stats can't be totally different and it's just "the feel" one has, not necessary justified.
Hear! Sons of Kahless
Hear! Daughters too.
The blood of battle washes clean.
The Warrior brave and true.
We fight, we love, and then we kill...
For the Bug it is FASTER than most any other Escort and has higher Shields and Hull to boot. The added speed means more misses from enemies and higher defense values added onto its greater numbers. This means that it can tank much more damage than any other escort even with similar setups. Add in the engineering consoles for added resistances and it is a tough one to crack while also being able to dish out the most damage. So yes... End of story on that one: It is OP. Dont forget about its universal BO's and 567 Tactical consoles.
As for the two Flag-Ship cruisers: These two are DESIGNED to be the biggest baddest ships in the fleet and they do not really let down their users. A Command Odyssey with the right gear and an Engineer captain can survive nearly ANYTHING. They are a serious cut above any of their competition in terms of stats and abilities so it should come as no surprise they dominate them.
The Galaxy class by contrast lacks the same levels of armor while having horrible turn rate and speed making it more flimsy. I own the Token given Retrofit Exploration Cruiser and despite losing a lot of tank by Saucer Separating the increase in speed makes me able to survive around 40% better than with my Saucer on. I know it seems counter-intuitive but in the end more speed is superior to more hull in many cases.
The Excelsior is a great ship but it is meant a bit more for dealing damage than receiving it. It can outlast a lot of weaker ships like most escorts but it is not going to be the hulking monster of a tank the Flagships are. Those are the Kings of the Cruiser/Warship line.
High skill magnifies the effect of gear, in this game. A few seconds difference of survivability is enough to start a whole buff rotation again. A 10 percent difference in firepower can be magnified with tac buffs until it's the same as a whole extra non-tac ship focusing fire on the target. A few percent difference in turn rate is enough in 1v1 for the other ship to have to devote huge effort just to keep you from sitting on their tail the entire match. A slightly superior BOff layout can buy you precious seconds of life with RSP without sacrificing normal survivability, or let you mount a powerful offensive ability without sacrificing tactical teams. It's not that gear trumps skill. In this game, as in most, skill is the most important factor. But similar levels of very high skill don't just cancel out - they magnify the effect of luck (procs and crits), gear (as mentioned), and team tactics (a whole other bundle of fun - why a premade of five people no better than your five people in 1v1 can wipe the floor with you every time).