Lack of 'clutch' hasn't been the problem. Unlike 2025 when the Mets were in the upper ranks of overall OPS yet only in the middle of the pack in runs scored* because their OPS w/runners on and w/RiSP were miles behind their bases-empty prowess, this year they're actually slightly-better with duckies on ponds.
So, no, the problem now is that they're DFL in OPS (tied for last w/COL in OPS+ where home field conditions are taken into consideration) which makes last week's 'scoring surge', one which boosted their RS/G up to a lofty 26th best in MLB, actually lean slightly to the fortunate side of things.
* not having access to the 'chives means I can't draw up the specifics, but at one point last year they were 5th or 6th in all MLB in OPS but somewhere around 15th in runs scored which, considering that OPS is the best correlation to runs scored, is really difficult to do but the '25 Mets somehow managed. Only one other club (ATH) had a bigger rankings differential at the time. That OPS-v-RS gap got smaller as the year went on -- regression to the mean and all that -- but never quite managed to synch up entirely finishing the season at a more reasonable 6th OPS vs 9th in RS/G,