If you're so against free SSl's with an option for shorter half life you could use a paid alternative? Not sure I understand your grip with a free service
"We really want to make sure you have automation, so certificate lifetimes have been reduced to 36 seconds; accounting for RTT and, in our generosity, time for a single timeout/retry" /s
Let it be my problem, please. I'll even use certbot or whatever is in fashion, just find another knob to turn [or don't].