They weren't Of course, yet you still gave it an F. Yes, the first time a new technology has ever been introduced in trek and then forgotten by the next episode Beyond was set 2263.2, 09 was 2258.42, so about 5 years. If they did they'll have dealt with it by having sex as normal (or maybe they went to Vulcan and Spock had a fight like in Amok Time), but it probably hasn't cropped up - TOS Spock's first Pon Farr was 2267, Beyond was in 2263. Promotion after 5 years of service as captain, including saving the federation on multiple occasions? Doesn't seem excessive. Yes, Kirk becoming captain in the first film so quickly was a stretch, but TOS Kirk went from becoming Captain in 2265 to Admiral in 2270, so 5 years as captain, especially given that in that time he saved Earth from Nero, Federation from Marcus, and Yorktown (and the federation) from Krall, seems reasonable. TOS Kirk's earth saving exploits didn't really start until after he became Admiral. I don't see anything in Beyond that makes him unfit to be a starship captain.