True, it happens, though I would not say "none"...United scooped up RvN, Rooney & CR7; Real poached CR7, Benzema & Kaka in the same transfer window; then there is AC Milan in the 80s/90s who had a whole army of top offensive players...
That said, I agree that sometimes stupid misses like ours can happen...Just ask Arsene, who missed out on Zlatan, Messi and whole other host of top top players in his heyday, even though he actually did spend a huge effort to bring them in.
What I cannot stomach is that we completely rejected Mbappe, because the board preferred to bring in the mercurial talent called Dembele, who has either been out injured, or been hampered by his attitude incessantly over the past 4 years.