That is problematic because it will receive TV stations and stuff along those lines VERY well.
That in turn will overload the LNA.
Not much you can do probably even with lowering gain.
If you have a dongle like the rtl-sdr v3 without integrated LNA it will likely receive much better.
As you already tried it, even a cut whip antenna might give better reception placed in a window. Exactly because the reception is weaker and the LNA isn’t overloaded.