I play and love both Go and MtG, and I think your assessment of MtG is not fair. The thing about MtG is that the real fun is not as much in playing the game itself but in the deck building. When I'm playing a game of MtG, I'm not thinking only about the current game or how to win it, but rather which cards/combos are working well, which are not working, what cards I should use instead, etc. to improve my deck for the next game.

Finding interesting combos among the thousands of existing MtG cards is also very fun and cannot be done in a minimalistic game with a very small number of components like Go. They are just games with different goals and scopes.

What I dislike about the evolution of MtG is the placeholder words that they constantly add to the rules, e.g. "lifelink" for "damage dealt by this creature also causes you to gain that much life". Cards with that ability existed before the word was introduced, so the word is unnecessary, it just makes the text of the cards shorter... but the constant extensions of the vocabulary make the rules harder to understand and remember. The actual rules are still mostly like in the nineties... in fact most, if not all, of the actual rule changes have been simplifications rather than complications (mana burn removed, meh). But they just like to make up unnecessary words, it's a pity.