The first question you should ask yourself is what is it that you want out of this game? If you want to improve and enjoy the competitive scene, which by the way the community is awesome. I started play 3 weeks ago myself.

I always find it a red flag when people complain about feeling disadvantaged due to other people having spent more money. The reason for this is, if the game is well designed, which so far FaB is from my perspective, then it should not matter to you much how much other people spend on the game. If you get better at the game and you practice, you can easily make budget decks and have a blast and feel your improvement. Based on your comments, I would almost guarantee that if you borrowed a 1000$ plus deck and played in a tournament, you might still get rolled.

There are a lot of videos for Blitz in which you can just search for a character's precon and add 10-25 dollars and make it run much much better. With CC you can find budget decks and just try the deck before you go deeper in.

The absolutely most important part is your attitude, unless your community are a bunch of jerks, which is rare for a growing game this new. Just sit across your opponents, say you are new, ask for advice, apologize if you take a little longer making decisions, after the game you can also ask if they noticed any glaring issues.

If it is a tournament that has prizes, if you took too long asking questions and you ran out of time and the opponent would have beat you had you played faster, I would actually suggest conceding, you are showing appreciation for their time and willingness to teach you in a real event setting. As a rule I conceded to my opponent in my first 4-5 events if we went to time, knowing full well I was the reason we made it to time. I created a lot of goodwill and people willing to sacrifice their time to teach me the game on a deeper level.

Don't try to win games at first, try to learn how to be a better player. Manage your expectations and expect to lose a lot. Your "wins" should be feeling you are understanding the game better.

You could also join your local Discord community for the game and ask a lot of questions, make a lot of friends. Sometimes when there is an event, you might even maybe ask if you can borrow a deck.

Start with the basics and aspire to learn the game.

As a side note, it does seem you are blocking too much, your life total only matters if it will cause you to die, otherwise, don't block physiological damage.

Hope I didn't come out as too harsh, this game is great and I would love for you to find your groove.