The problem here is not the quality but the topic videos they make have a very strong appeal even though they are new accounts
Luck is also important. Some channels get blown up even when they are new but it does not mean that you can repeat their success by copying them. But if you stick to work and keep improving content quality, ultimately you will see success.
All new channels cannot get millions of views. If you calculate ratio, even 0.1 % of the total channels will not reach there.
Are you posting AI content? Because if the problem was only on one or two video, then it was normal. But every video limited to 400 views means you are doing something wrong.
Yes, tweaking titles, descriptions and hashtags to be more keyword-relevant could be a solution.
gmails used for creation channels are not the same, a gmail created in the usa has a high trust score that one created in another country, if you upload the same content on two gmails you will get different result, instant views vs views after 6 hours, 2k views against 0 views.... there are many other factors too, original content, or same video but with different background to confuse the algorithm...
