This post seems to lack some context and hard data. Yes, Arteta has had time and that's been great. And he has received some backing but I think anyone that believes this young squad was ready to compete for multiple trophies is arrogant, delusional, or just opposition fans having some banter.
Looking at the hard numbers:
Squad Cost
1. Chelsea – €1.01billion
2. Man City – €960.6million*
3. Man United – €876.2million
4. Liverpool – €709.05million
5. Arsenal – €531.5million
Wages
1. Chelsea F.C. – £212,090,000
2. Manchester United F.C. – £211,875,000**
3. Manchester City F.C. – £182,640,000*
4. Liverpool F.C. – £158,788,000
5. Tottenham Hotspur F.C. – £110,438,000
6. Arsenal F.C. – £97,878,000
*City numbers may be artificially lower than reality
**United might be including Cristiano here, not sure
So yes, sure Arteta has finally started getting some backing but still missed first-choice targets in January. The resources that have flowed into the squad are still behind the other top clubs. Personally, I don't think the squad is ready, this year, to be competing for trophies on multiple fronts so I'm much more laser-focused on the league this year. With continued investment, I'd love to see the club compete on multiple fronts but it's just not realistic or based on facts to expect that this year.