How to Actually win anything?

You managed to win something like a day after joining the site, that's actually remarkably good luck.

It's been a month

Registered 2 weeks ago 🤔

level up a bit, better odds even at level 1, way better up around level 3. see you qualify for unlucky 7.
also, be patient, 2 in 2 weeks is p f'n good

2 wins / 400 entries is really good - if you're not selective for the games you want
If you become selective and just want games from your wishlist, probability is that other people want the same games too, that will get many entries, and then it can take forever
But you can increase your chances joining groups or increasing your level by gifting games - you can also try to solve puzzles on forum or take part on forum event

I white list you, you white list me ... we do white list giveaways. Join a group and gift to the group low number of members will give you higher chance to win, but groups have rules

https://steamcommunity.com/groups/aceventurasgiveaways

Let me math it out for you.. If you participate on average on 1 copy, 1000 entries giveaways and you have entered 500. You had about 39% chance to win something while again 61% chance to win nothing....
As for your games from wishlist, those probably have 7000 entries, right? That would give you just sly of 7% chances of winning anything while 93% of winning nothing when again you have entered 500 times/giveaways...
So it's not that easy and you can't really wonder why you don't win when the chance is what 1 time out of 1000 on average/at best?

If you only want to win and don’t want to give, you will be at the mercy of bots. Level 0 public giveaways always have 1-3k entries.
Make a few giveaways yourself and increase your level so you can at least enter level 1 giveaways, and your odds will increase. Regardless, you’ve been quite lucky yourself!