They loosened measures in 3 phases, with half the country opening up at beginning of the June iirc. The curve is pretty flat until middle of July. Fatalities were also at relatively low count between middle of May until middle of August, with 1000 deaths. Since the end of August, they have been increasing measures and slowly locking up. Since they reintroduced some of the measures back, the fatalities went up.
You cant interpret this both ways ofc, if they started lock down sooner, there would be less deaths in September/October. Or inspite od locking up, fatalities went up significantly then when measures were loose. Incubation period is 5-6 days, more severe measure end of August, peak in fatalities beginning of October....
With the estimate that on every reported infection, there are at least 10 that go under radar between asymptomatic and mild cases, IFR rate in Spain is prolly around 0.1% - 0.3% and they are one of the worst hit countries. Relatively low count, and imo not enough to justify strict measures and consequences it will leave. But leave all that aside Im sure if you lock everyone in for a year and allow them only to do basic stuff when going outdoor, revoke everyone's drivings license, there would be even less fatalities, but is it the way we should live? I mean the fact that we are having this discussion, means our ancestors managed to survive all kind of ilnesses throughout hundred of thousands of years, which added up to our immunity. I wonder how the constant use of disinfectants will reflect on general health, will the number of allergies spike up, etc... If the IFR for Covid was higher and if affected more severely all age groups, Id take all this more seriously.