I'm not sure if you meant the 2 Aggressors operating in the Red Sea, or the entire Aggressor Fleet. Some people are indeed put off. From your profile you are based out of Poland; I don't know what dive destinations are your main interests or what providers you have to choose amongst. For others who may run across this thread, it may be worth a brief tangent (from the perspective of a North America-based diver, since that's where I am and many others are).
1.) A number of Aggressor Fleet boats have had criticism in various threads on the forum. Some issues alleged were sufficient that I, too, would likely steer clear of those boats.
2.) The extent to which Aggressor Fleet 'runs'/controls operations of individual boats isn't clear to me. From other threads, I get the sense they had a fairly strong hand in the Caribbean, but may act more like a booking storefront for some more distant vessels?
3.) Some Aggressor boats are reputable and have received a number of good reviews. I've been on the
Belize Aggressor IV (then called
Sun Dancer 2),
Cayman Aggressor IV and
Turks & Caicos Aggressor II with strongly positive experiences.
4.) That said, a boat that gets good reviews when things go smoothly may get a bad review when interruptions/problems occur and management is seen as handling the situation badly (if at all). See
Cayman Aggressor: When does it become too much?
5.) Bad reviews are not confined to the Aggressor Fleet boats. In fact, because their boats are identified under one brand, that brand gets flack for problems with a number of boats. A much smaller operator with problems might not be brought to our attention, or if so, we might not remember it long.
6.) At some destinations, at least in the Caribbean, an Aggressor boat is your main liveaboard option (e.g.: Belize).
7.) Someone in another thread once recommended judging Aggressor Fleet boats on an individual basis, rather than as Aggressor Fleet boats.
I don't avoid Aggressor boats, but I don't preferentially seek them out.