An antenna that performs on multiple bands will often be a compromise and will perform differently on each band depending on length of antenna and resonance.
Better performance can be achieved on a mono-band antenna, and could also still be resonant on other frequencies.
Southwire or Cerro Vinylon THHN wire
End-Fed Half-Wave. Uses 9:1 UNUN to bring resistance down to an acceptable tunable level.
Reception can improve with counterpoises.
EARCHI Antenna, HyEndFed, MyAntennas
Antenna layout styles, sloper, inverted vee.
Also reference the often counter-argued sidekick - ZS6BKW - https://www.w5ddl.org/files/Zs6bkw_vs_G5rv_20100221b.pdf
Great for attics. Resists noise.