Chelsea are two times champions league winners therefore nobody should be saying Chelsea isn't a big team. Not many teams have won more trophies than Chelsea. Just because they were going through some difficult times doesn't mean they're not a big club. An example is Manchester United, they have been awfully recently but still a big team. History can't just be forgotten because it's history that makes clubs big. There are some clubs that are just becoming big recently but the ones that have being doing it for a long time can't be disregarded. Chelsea have a good squad now and I won't be surprised if Chelsea end up winning the champions league.
Anyone who will rate Chelsea as an average or small club probably just started watching football games recently because how will you rate Chelsea as a small club. Chelsea as a football club is 120 years old and in these years they have achieved so much to be rated as an elite club and their reputation speaks volume.
I'm actually surprised to read something like that and I cannot understand how someone can call Chelsea a small club because right now , after what I saw at World Club Cup , they are the best team in the world without any doubts. Sure , PSG is the UCL winner ...but their current team seems a bit fragile without Donnarumma and their internal conflict and that's why for me Chelsea is the best club right now.
Also , they are my favorites to win EPL too and we all know once in a few years , Chelsea likes to simply dominate EPL and UCL as well.