Now that we're talking about reqs, I'd like to offer some tips on getting them!
To be realistic here for a second, if you're not comfortably and consistently at least 1800s on ladder, I think it's going to be very difficult to reliably get reqs. A lot of luck or a fire team can get you there once, but there's no replacement for skill.
These tips aren't gonna improve your skill level and giftwrap you reqs, it's just gonna make things less of a grind and help you be more efficient.
1) Early losses kill your gxe
Gxe is the chance you'll beat a random player, so when you win or lose vs somebody with lower or higher gxe, there's a few ways this can play out:
a) You win against somebody with a higher gxe than you --> your gxe improves a lot
b) You win against somebody with a lower gxe than you --> your gxe improves a little
c) You lose against somebody with a higher gxe than you --> your gxe drops a little
d) You lose against somebody with a lower gxe than you --> your gxe drops a lot
This is why some people can qualify with 29-1 and others with 30-0, or some with 34-3 and others with 32-3. The same W-L record does not gaurantee the same results, it depends on what kind of players you fought.
Ideally we avoid d) as much as possible, because we want the highest gxe we can get, so I always recommend going at least 10-0 to start. Ideally you can manage something like 16-0 or better, but 10-0 is the bare minimum imo. From there, I think 22-2 into 35-5 are good benchmarks to try and hit. Once you're at 35-5, you're almost done, so just keep going without letting your gxe drop below 78%. After 40 or so games, you're gxe isn't gonna drastically change, so if you're stuck at 77.8% or something (and we generously assume that every win improves your gxe by 0.2%) then you would need 11 straight wins to make it back to 80%. This is unlikely if you ended up below 78% in the first place, so try not to get screwed here. These are just general benchmarks I use, not some hard and fast rule. Don't be afraid to abandon your current alt and grab another if you fail to reach these benchmarks by a longshot. I went 2-1, 3-1, and 3-1 for kyurem reqs before going 34-3. Random shit gets you sometimes, don't let it tilt you.
In summary: Go 10-0 --> 22-2 --> 35-5 --> Finish without <78% gxe.
2) Any teamstyle can work, at every stage of the ladder. Use what you know best.
Some may disagree with me on this one, and I used to spam HO until I hit 1500s or so before switching to something I'm more comfortable with. That can work too, but I don't think you need to pigeonhole yourself into anything specific. HO, BO, balance, and even stall can be used from 1000 to 1700, for the whole run. What matters the most is how well you know the ins and outs of your team, and if you were able to reach and stay 1800s with it, you should be good. Gen9 in particular really demands you learn how to use your not only your 6 mons but also your 6 teras, and this takes practice, so use what you know. I've gotten reqs for every suspect this gen by just loading 1 single team the whole time that I was familiar with.
3) Be familiar with samples, RMTs, TOTW, and other public teams. And don't use them.
More than any other generation, I feel that teams get MUCH worse the second that they go public. Tera types and other surprise techs provide immense value in this generation where every turn matters, and the gap in information makes a huge difference. Knowing which tera types to expect, what moves your opponents have, and what items to play around makes your gameplan much stronger. Don't give these advantages to your opponents. You should absolutely know mimikyu stardust's and pinkacross's HO RMTs inside out by now, and definitely just snag the TOTWs and successful RMTs you see. Put them in your teambuilder, not because you're gonna use them, but so that you have the advantage when you run into them.
This does kinda require you be proficient at teambuilding yourself, or just have good friends who are, but that's how it goes. You can also steal teams from tournament replays (especially SPL), but keep in mind these are not necessarily built to be consistent on ladder, and you will have to fill in some blanks yourself (especially tera types).
4) After 30 games, keep close track of where you are.
Type /rfaq reqs in the OU room or refer to every suspect test OP for the chart that tells you the gxe requirement that corresponds to total games played. Do not screw yourself by achieving reqs, loading another battle, and then losing. It's a really frustrating mistake to make, so just keep that chart open and make sure you do not miss the moment you get reqs.
The current system of suspect tests and getting voting requirements is not perfect, but I do think it's very accessible and fair, while being just difficult enough to serve its purpose. We can discuss other ways of getting them, like attaining specific elo benchmarks with a fresh alt or winning special suspect tours, but ultimately there should not be any "easy" way to get them.