that does not back up your claim “masks are a waste of time”You're not really an honest broker are you, the very first one I checked you cherry picked the conclusion and left out the wider context, which was this;
'CONCLUSIONS Most included trials had poor design, reporting and sparse events. There was insufficient evidence to provide a recommendation on the use of facial barriers without other measures. We found insufficient evidence for a difference between surgical masks and N95 respirators and limited evidence to support effectiveness of quarantine.'
I don't need to trawl through the rest to know I'll see this obfuscation by you repeated do I. If you're going to debate, try and be honest about it, otherwise it's pointless.
all it says is the trials had poor design, but then it’s surprising given that study was from 2020.
the later studies I linked from nature.com confirm masks are effective.