I guess I’ll never quite make it to a dreadnought... In short, I’ve equipped the ship with 4 boosters, about 30 RCS units, around 24 mega missile launchers, and 6 mega gatling guns.
Perhaps the ship's size matters, since I was previously satisfied with a Heavy Cruiser and it was relatively comfortable. But after expanding the hull and increasing the armament to Battlecruiser level, these issues have emerged.
UPD: It was strange, however, to decide to install two additional pairs of boosters. Removing them resolved the issue. Without your explanation, I wouldn’t have realized that this was the key to the problem...
Thank you for your reply!