You know you c*e FM or WM heal/mystery to avoid that right? Hell now even earth main can do that if you also use SN or another chakra giver to launch 3rd mystery turn1. Wind main doesn;t need han since she has a mystery of her own. Whio would pair LM with han???

In any case this situation is VERY easy to avoid just with your main, ;et alone ninjas like kurenai, ningendo, healers, etc. Han is a great ninja, very tanky and very useful. Just pair him up with the correct ninjas in your lineup.

Also if you were expecting him to singe handedly win you all fights against all other teams no wonder you are disappointed.

A lightning blitz team that uses seal mystery? Now that's an imaginative interpretation of what a BLITZ team is. So it basically LM attacks only 2 times and he still kills your Han? At similar BP? If the answer is yes you have to seriously invest in magatamas and defense.

Han is a hard counter against lightning blitz. It is not infalible but 9/10 times he will stop them right in their tracks. If the rest of the team is properly set up then even if Han dies the lightning team will be heavily damaged by that point. If you have higher init then you have the advantage, so its normal your chances of winning increase.

Now if you have a lightning team that is not a blitz team, Han's effectiveness will be lesser. He is not a god ninja that will allow you to beat any LM setup such as susanoo brothers ot DP Hidan teams. It is a great ninja that has its uses, it will not however win you the fight by himself and certainly does not specifically counter LM. He counters blitz teams that rely on multiple stacked buffs and killing 1-2 ebnemy ninjas round 1.