Hold on right there, eliminating Real Madrid?

I think it is way too much. We watched Arsenal in the Champions League. What did they do? They weren't good enough like they were in the Premier League, right? Arteta must be prioritizing a PL trophy for a long time so we don't see the same exact performance in the CL. Otherwise they had quite a big potential there too.
Arteta will go for new signings, yeah. It looks like a top striker is the main target now. Nketiah can't be any use for a team aiming big successes. Gabriel Jesus also isn't like in the past unfortunately.

What the joke from Arsenal fans about their favorite team will eliminate Real Madrid in quarter final of Champion League next season

? Must be realistic Arsenal failure reach the higher round in Champion League last several season and have been long time ago when reaching the final round but defeated by Barcelona.
Arsenal can perform well in Premier League by pressure Manchester City but lack mentality winning in Champion League how Arsenal never get good result when facing the experienced teams in Champion League. Bayern Munich last season success eliminating Arsenal in quarter final round and I sure if both teams face again next season not any opportunity yet for Arsenal.