Yeah, it's really a mind game where FOMO tends to be the order of the day, and it's not as though those quick buys are always bad moves, it just often ends up badly just the like WC is for most people, their team then became shitty after around 2 games of using the wild card whereby they'd need to take several points hit in order to field a 11 squad.
I've solved this problem by filling up my whole squad with "essential" players, so now I've got all of them in my squad bar Haaland.
Saka, Son, Bowen, Foden, TAA, Gabriel, Solanke, Virgil, etc (would be Saliba but I already have Raya).
Only other person missing is Watkins and I just got him back in.
It might have been because my squad value is 102.6m excluding funds ITB, but even from next season, when we start with 100m, it seems to be affordable if you switch Salah with some 8.0 mid (assuming he goes to Saudi), and use whatever is remaining to get a back four of TAA - VVD - Gabirel - Saliba - some 4.0 DEF and then cheap out at GK.
Haaland is not really essential nowadays, his FPL points can be covered by Alvarez and 1-2 premium DEFs.