Wasn't there so don't know, but a pilot instigated go-around is not a bad thing....good on them. Far better to go around and have another go than press on in a bad situation and end up in an embarrasing position (like off the end or side of a runway)One airline I worked for was criticised by the regulator for not having enough go-arounds!
Any airline worth their salt will have a positive attitiude to pilot induced go-arounds.
The second one sounds like it might have been instigated by ATC. Just unfortunate, but again, the safe decision.
As for fuel shortage, probably not, but don't know that particular airline's fuel policy.