Hi irikotori,
I honestly don't mean this in a patronising or dismissive, but if you're not enjoying the game or the series anymore, then it might be worth taking a break or going back to one of the earlier games (they seem to have gotten more popular with the release of BF6 nearing). Gaming should be fun at the end of the day, and I find that sometimes taking a break helps. I'm in my 40s too, so I know what you mean by having limited time to play, but I quite often just play other titles when I get frustrated with Battlefield and I usually enjoy myself when I go back to Battlefield afterwards.
As for BF6, you could try the open beta this weekend and try to use that to judge if you'll enjoy it or not.
