Joe Root declared he wants to keep the England Test captaincy but acknowledged the decision is not entirely in his hands after another series defeat.
Root believes team-mates remain firmly supportive of his leadership, despite a disappointing loss against West Indies.
Draws in Antigua and Barbados teed up a winner-takes-all decider in Grenada, but Root's tourists were always behind after falling to 90-8 on the first day.
Jack Leach and Saqib Mahmood proved unlikely heroes to drag England to 204 all out in the first innings, though a sorry bowling performance allowed West Indies, inspired by Joshua da Silva's maiden Test ton, to scramble to 297 - a lead of 93.
Further batting struggles saw the visitors skittled for just 120 second time around, leaving Kraigg Brathwaite and John Campbell to chase down a target of 28 in just 29 balls on Sunday, sealing a 10-wicket win.
"I've made it quite clear at the start of this game and throughout this tour that I'm very passionate about trying to take this team forward," Root said.
"I will control all that I can. I don't think it's ever in your hands completely. I feel like the group are very much behind me. We're doing a lot of really good things; we just need to turn that into results now."
England are without a win in five Test series, stretching back to a triumph over Sri Lanka at the start of last year. They are also without a win in their last nine Tests, losing six of those, which is their longest winless streak in the format since a run of 10 between August 2013 and July 2014.
Root told BT Sport he felt a sense of "frustration", adding: "Throughout this series we've played some really good cricket, and we've shown what we're capable of as a group.
"We've grown over the first two games as a batting group, and we've shown big strides in that department, and shown what we are capable of. Yesterday really let us down, it's really hurt us, and it's an important day within the series.
"We just didn't stand up to it well enough, and unfortunately you find us in this position where we've ended up losing the series after we played so much brilliant cricket."
The England skipper added: "I thought the attitude throughout the whole thing has been brilliant – in that respect we've definitely made big improvements. That has to continue.
"There are so many good things we can take away from this. Of course, we came here to win, and we've not, and that's frustrating, that's disappointing. But if we're going to keep learning and keep growing as a team, and if we're going to start winning, then we've got to keep that approach."
Interim head coach Paul Collingwood, who replaced Chris Silverwood in the wake of a 4-0 Ashes thrashing, said he had observed total support for Root among England's players.
He said: "The one thing you do notice in that dressing room is that the team is together, they're right behind Joe.
"You can see all the players, all the management, and you can see Joe himself, he's got the determination to still take this team forward and get results.
"The leadership doesn't affect his batting. He's still going out there and scoring the runs and he's still desperate to turn things around and desperate to make this team the best they can be."
Regarding his own uncertain future with England, as the search continues for a permanent coach, Collingwood added: "If I was to be given the job, or they decide they want to give me the job, then I would certainly take it. I've enjoyed it a lot more than I was expecting to."