There really really does need to be a fall back reward.
A guarantee of the legendary season relic after 40 or 50 or even 60 ultimate caches being opened. Just to stop frustration like that above. (60 seems a little high but you should get one before that)
*I opened 22-23 caches from season 1.4 and no ultimate. That sucks but I get it. If I was to open another 30 caches and still not get the seasonal legendary item I’d be starting to get pretty annoyed.