The reason why I give Messi such a hard time for Barcelona's tactical problems is because he's the whole damn system. That team is completely built around him in a way no other top team is built around a single player. The moment that changes is the moment the best squad in the world will actually play like the best team in the world imo.
But why give him a hard time for that when he isn't the one asking for the team to be built around him?. He was the first one to tell Suarez to go back to his striker position in the middle of the game for the sake of the team, he shared the creativity with Neymar in his last season, he also tried to acommodate his play to Dembelé.
It just seems like giving him a hard time because you want to, of course Valverde comes and uses a 442 where Messi is the star, is the easy way, the lazy way.
If anything last season showed that Valverde knows tactics. He went 4-4-2 for obvious reasons. In Enrique's last season Messi did not play on the right anymore and Alves, who could hold the entire flank on his own, left. That left Barca with Messi strolling in the middle and Sergi Roberto all alone on the right. Only way to fix it was 4-4-2 with Messi and Suarez up top + 4 midfielders keeping it tight. Made even more sense with Neymar gone.
No pace on the counter was hardly Valverde's fault. Squad is what it is. Suarez is slow, Messi is only quick on the first few steps, Dembélé was injured most of the time and missing training sessions.
He did a great job last season when everyone predicted Neymar leaving was going to end Barca.
Valverde got exposed in the away leg vs Roma harder than any manager I remember, at least on the tactical side, Roura is the only one I remember being dismantled so bad (legs vs Bayern, PSG and Real madrid in 2013) but he wasn't really a first tier manager, he was just an analist/assistant with 0 experience as main coach in any level.
Our counter speed past season... you don't really need 3 bullets to run a counter, Simeone plays that way with success, he has just a strong lone striker (prime Diego Costa/Mandzu have never been better than any Suarez version at Barcelona) and flooding the area with CM's. With Alba and Semedo on the wings, Suarez fixing defenders and great 2nd line players like Messi, Rakitic or Paulinho behind them, playing a good, effective counter style was possible.
Messi still has legs to run counters, and even when he loses that, he still has the vision and the range to be the architect in counters, Guti stopped looking like a fast player when he was 22 y/o, he's still one of the most exciting counter players I've seen.
Valverde never tried that, because if you put countes on top of his defense-first mentality he's gone by December, you can do one or the other in Barcelona, but not the two at the same time.
Edit: What you point about Luis Enrique, Lucho knew that and tried to work around it with the 3-4-3
https://www.barcablaugranes.com/201...-did-it-work-for-fc-barcelona-atletico-madrid
Problems? Alba was left out as a LM, we lacked a good 3rd CB choice as only Mathieu and Mascherano were the options, Umtiti was green and our midfield was even worse than this year or the past one. I'm sure that if Luis Enrique could work from preseason with a 3-4-3 consisting of Ter-Stegen, Pique, Umtiti, Lenglet, Sergi Roberto, Busquets, Alba, Rakitic, Dembele, Suarez and Messi, with Coutinho, Arthur, Vidal and semedo as options on the bench he'd probably perform better than Valverde in the 3 competitions