Oh I agree, I just feel the OP is lacking that balance.It's definitely fair he is criticised. However it's also reasonable people can counter balance that. He has had significant injury problems which have probably halted his career. He is also a completely different position to Lukaku and one that breaks through more at a later age.
Pennington was very poor yesterday, perhaps so poor we may never see him again. However there is a revisionism. Last season he was identified to be playing ok, in fact was pointed out by MOTD as one of our best players in a win against Bournemouth. I saw that game too and was very impressed with him. He has been one of the better players in our under 23's, and when we were short of numbers came in and struggled. The criticism needs to be balanced and fair.
Anybody who blames the youngsters for yesterday needs their heads testing, but I don't see the harm in pointing out flaws and giving an opinion. Personally I thought Pennington looked poor last season too and am on record saying so, no revisionism required.