Help in Battlegrounds

I just reached Uru and for past 2 hours I lost every match i.e. 21 matchups in a row. I am returning player and at Paragon level at present. Don’t know how to proceed. Matchups are very tough and usually all of them were Valiant with stacked battle deck.
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Comments
Some are quite large, as not every valiant is going to grind out GC. I play 3 matches every other day. The radiance differences just don’t matter that much if I tried to max out my potential (which has a definitive ceiling) and I don’t like battlegrounds THAT much. You just have to learn to accept your limits in that mode.
I know — it's a skill issue, a roster issue, and a little spender issue. But I believe that 95% of players are probably in the same situation as I am.
At some point, everyone stalls out, because eventually everyone reaches the level of their skills, and since BG is a competition and you’re playing against other players, eventually you rise to the point you’re equal with everyone else. If competing against people that are just as strong as you are to try to get better is unappealing, then competition is probably not for you.
That’s the difference between PvE and PvP. In PvE, everyone can theoretically win most of the time. In PvP, essentially no one can.
Roster matters, and if you’re a lower Paragon facing off against all the Valiant monsters that’s going to be tough, but you got into GC in the first place and the competition from V2 to Uru 6 isn’t a gigantic leap, or at least shouldn’t be. And by the way, if you did 21 matches in two hours that sounds like you’re forfeiting at least a few of them. I wouldn’t recommend that. Play the match. Just because your opponent has a giant roster, doesn’t mean he knows how to drive it. You can run into a less skilled player, and you can get lucky in the draft. In fact, consider this: if you’re running into them with zero rating, ask yourself why they have zero rating with such huge rosters? You aren’t going to get better unless you actually fight the fight, and meanwhile if those guys have zero rating in Uru 6 with those big rosters, eventually you’ll be able to take at least some of them.
Lets be honest here, roster matters in BG almost just as much as skill.
That being said, I do agree that you reach a ceiling after which you can't progress but this point of yours makes it seem like skill is ALL that matters and sounds a little condescending to be honest.