I made a deck decades ago...

[Raskolnikow]

...and now I´d appreciate some feedback.

I used exclusively cards of the Onslaught-block back then.
The red-blue deck is designed around the Skirk Alarmist and the Dermoplasm to deal a death blow to the opponent with a fire-breathing, flying green 9/9 Krosan colossus on turn 5 in the best case scenario.

https://deckstats.net/decks/246025/3332428-morph-beat-down

[Landale]

how can the deck be integrated here in a visually pleasing way?

When you make your deck, use custom subsections. Ideally you should have a section or two for your deck's goals, one for draw/card advantage, one for interaction, one for ramp, one for any other utilities, and finally one for lands. This allows you to more readily see how well your deck is distributed, and allows others to do the same to more quickly assess where your decks' weaknesses are to provide feedback.
For example, this deck is using custom subsections:
https://deckstats.net/decks/168446/3271322-hylda-of-the-icy-crown/en
While this one, exactly the same, is not:
https://deckstats.net/decks/168446/3332795-copy-of-hylda-of-the-icy-crown

[Raskolnikow]

Thank you!