There's no issue with a young team being inconsistent, but being consistently poor against lower half opposition is still a worry until it's addressed, rather it's an issue with mentality, tactics or both. There's plenty of young teams built in the past and present that are able to show their quality vs teams like Crystal Palace and Bournemouth. Arsenal's young team under Wenger, years back, although didn't win titles, put away weak opposition fairly consistently which is why they always ended up 4th.
We haven't been consistently poor against weak teams. We've beaten some lower teams this season but also not beaten some. Which is what inconsistent means.
Arsenal were like Spurs under Poch. Consistently good against weaker teams but consistently bad against top teams. We're good against top teams and inconsistent against weak teams. So I'm not sure what you're trying to say.