Chelsea are having a very similar season to United actually. In the last few weeks they have won away at Tottenham and Arsenal - very good results that reflect well on Lampard. They have also lost at home to West Ham, Bournemouth and Southampton though. Imagine the noise on here if we had lost those 3 home games, and yet you claim that only United struggle against weaker sides? They struggle for consistency in the same way that United do, because they have a new coach that is still getting to grips with the squad and they have a number of young players that will struggle to be consistent in this league, but they are being patient with them because they hope that the end will justify the mean - sounds awfully familiar doesn't it.
Squad wise Chelsea are stronger than we are. They have a lot more depth, particularly in forward areas. Yes they had a transfer ban and lost their best player in the summer too (we've lost Pogba too), but they were fortunate that they had an army of loaned-out talent that they could, and did, call upon. Abraham, James, Mount, Tomori & Pulisic are all effectively new signings. If Chelsea lose Abraham, they call on Batshuayi. Lose him, they have Giroud. Pedro, Willian, Pulisic & Hudson Odoi ensure they are always strong in attack. Their squad is deep - particularly in forward areas, and yet they have only scored 3 more league goals than a United team that are unable to rotate and are crippled by any injury we suffer.
If that's not enough then what about the fact that we've beaten them twice this season. 6-1 on aggregate so far.
Lets face it, neither Ole nor Lampard should have any concerns about being fired this season. Both clubs knew what they were taking on when they appointed these managers. Your post is a classic example of many that we see on here that have a problem with Ole and refuse to be balanced in the analysis.