They invested more than Roma or Lazio in the recent years isn’t it? Maybe Napoli? Better even not talk about Atalanta. Clearly it’s not only related with the football coaches there.
Roma transfer movements this season was an embarrassment. They basically lost solid players like Manolas, El Sharaawy who despite being a strange folk did a very decent season last year, lost Pellegrini to Juve, loaned out Schick who despite not being a top player, he was offering depth to the squad, etc.
The incoming players were all underwhelming:
Pau Lopez is decent GK, but I don't think it was the most necessary position, Spinazolla was clearly overvalued, Cristante is not top team material, and the amount of loaned players they got indicate that they clearly entered panic mode.
They are basically worst than last season squad wise.
As I said before, I really pity Fonseca, because he's a very good manager and deserved a better squad.