Grinding in Elite Dangerous is very much a choice. You chose to grind, if that's what you want to do.
Want an Annaconda? You'll have to earn it; just like in RL if you want to drive a Ferrari you are going to have to earn it - and you might find it a bit of a grind to earn that!
You don't need an Annaconda to 'win' Elite. You don't need a Ferrari to 'win' RL. Neither example actually has a 'win' condition - you don't become Benevolent OverRuler of the Galaxy, nor do you become immortal in Elite
If you choose to view Elite status in al three professions as the 'win' condition, yes you will 'grind' and you might find yourself bored. Once you have Elite, then what? Visit every star in the Galaxy? That would be a bit of a grind.
You can happily tool around in an Eagle, or Hauler, and never fly a large, expensive freighter, and still attain Elite.
The best way to give yourself goals other than 'grind' until I get Conda is to socialise; whether that is taking part in PowerPlay - lots of people sneer at it, but have you tried it? Have you jumped into Reddit and got into the offline planning with other players? It's rather good - join Antal support Utopia!
Maybe you'd prefer racing? Join the Buckyball Racing League, or the Elite Racers. It's great fun.
Or if being social isn't your thing, make your own story. Elite Dangerous doesn't give you a 'story' or a 'plot' - it's up to you to provide those. Do that and you will have much more fun and a lot less grind.
As a last point I have noticed there is correlation between 'grinding', 'greifing' and 'whining' - those who complain about the 'g's tend to 'w' as well. Likely because by 'grinding' they over-estimate the actual value of their fictional spacecraft and see it as a real physical item bought for real cash. If that's the case then maybe Elite Dangerous is not the game for you - it's ok to not enjoy a genre. I hate RTS and Tower Defence games. I think they're rubbish, but I don't spend my time posting on their forums that their games are too 'grindy' and don't have enough ship to ship space combat in them. I also don't demand refunds because they weren't what I wanted, I just think 'bah, waste of money, don't buy games like that'.
Loosing the sense of entitlement helps, too.