The catering can be a matter of taste. I do not like BA's but it's certainly not the worst in the sky.

However this thread is talking about the seat. Business class seats are worse in Europe compared to just about anywhere else in the world, but is BA the worst of the worst? Maybe there are some obscure airlines which are indeed worst and if so then I will be happy to lump BA with such airlines. But if we're talking about comparing with airlines that BA aspires to compare itself with, then perhaps BA has the worst seat, or tied for worst. Is there an airline that sells genuine business class (not PY) 3-3 with no blocked middle seat? Maybe there are (I have not flown every airline out there) so I would be curious who it is. And is there any airline with seat pitch less than BA in business class (30)? Some are equally bad such as LH. I see on seatguru 29 seat pitch for OS on an Embraer but 1-1 layout so I would give up the 1 inch seat pitch for 1-1 instead of 3-3 with blocked middle. I checked a few other airlines quickly on seatguru and I cannot find any major airline objectively worse than BA. I think LH = BA in last place. Someone mentioned Air Serbia in this thread, according to seatguru seat pitch is 39, leaving BA and LH in the dust.

Back to the comparison Europe vs rest of the world (which is a different discussion), I can imagine someone who prefers 3-3 with blocked middle seat to 2-2 without a middle seat because they are further away from their neighbor. Personally I do not, but anyway the deal killer is seat pitch. Airlines with 2-2 usually have much better seat pitch in J than BA.

Further away from topic, on the A320 I prefer a window seat in the last row of Air Canada Y next to toilets than BA CE. At least I have IFE, power for phone / laptop, and better seat pitch too. And wifi (although not directly seat-related). What I give up for all that is some probability that there might be someone sitting next to me if the flight is completely full, in that case the middle seat in the last row won't be empty