Is Lichess better than chess.com?

No chess.com real 3D looks bad (and also cause my browser to glitch), there's something wrong with the material: strange shadow on narrow part of pieces, bright flat top of rooks. Also knight's shape is odd, and background is too dark. Plus pieces are too big for this board, too tight placement, harder to understand what's going on. Lichess isn't real 3D but at least material is ok.
Anyway I prefer the old style pixel-art of Chessmaster, much better than any 3D stuff and you can configure the board for best readability:
Only thing I don't like is bright red color of "black" pieces, I'd prefer something more neutral but I can live with that.

I do prefer lichess for everything, except free lessons and club activity, but there is a limit for free lessons, I also like chessable for that. One thing I specially enjoy over there is "chess insights" it takes your rated games data and shows a bunch of correlations, like your accuracy on game phases for example, you can filter the data too. Just as I finish a game I like to go "pratice your mistakes" if it is a long game I put in a study for analysis. I am able to review puzzles and see where I should get better, make/copy studies and use spaced repetition on listudy. Since it is open source I can personalize the appearance with themes...
In short, as a free user lichess is way superior

It depends, Lichess requires donations to stay up and running whereas chess.com uses memberships. So Lichess is actually not completely free to play as many believe because if it doesn't get enough donations it will stop working whereas chess.com will stay up unless the community riots. So me personally I like chess.com but that's my opinion.
All free open-source software works like that, who can and wants to can donate... I suppose not only individuals can donate, entities that have an interest in chess may as well
3D pieces on Lichess look nicer
but the board is cheap
Chess.com's "Real 3D" board and pieces look pretty nice, IMO: