I dont think so, obviously you need to have some skills but not for dont reaching it you are bad. I took nearly 2 years to reach legend.
What (imo) really demostrates you are not so good is when you need to use the legend card back to probe you reached it :).
After taking a hiatus from the game, sometimes I'll come back and "flex" my legend card back. My real motive, though, is to give my opponent a slight ego boost to make him think he beat someone good haha. It ain't much, but it's honest work =P. Gotta spread positivity somehow.
Wait a minute, are there people who are still intimidated by the Legend card back in 2020 ?
And as for OP.. Legend isn't a grind for a good player. It IS a grind if you're a slightly above average player but in reality you don't need to be good to reach it.
However, you need to be good to consistently reach it every month & achieve high Legend.